• How Unique You Are!

    BEFORE starting your activities each morning, do you glance in a mirror to check your appearance? You may not have time to be contemplative then. But take a moment now to marvel at what is involved as you take such a simple glance.

    Your eyes enable you to view yourself in full color, even though color vision is not vital to life. The position of your ears gives you stereophonic hearing; thus you can locate the source of sounds, such as the voice of a loved one. We may take that for granted, yet a book for sound engineers comments: “In considering the human hearing system in any depth, however, it is difficult to escape the conclusion that its intricate functions and structures indicate some beneficent hand in its design.”

    Your nose also manifests marvelous design. Through it you can breathe air, which keeps you alive. Also, it has millions of sense receptors, enabling you to discern some 10,000 nuances of smell. As you enjoy a meal, another sense comes into play. Thousands of taste buds convey flavors to you. Other receptors on your tongue help you to feel if your teeth are clean.

    Yes, you have five senses— sight, hearing, smell, taste, and touch. Granted, some animals have keener night vision, more sensitive smell, or more acute hearing, but man’s balance of these senses certainly allows him to excel in many ways.

    Let us, though, consider why we can benefit from these abilities and capacities. All of them depend on the three-pound [1.4 kg] organ inside our head—our brain. Animals have functioning brains. Still, the human brain is in a class by itself, making us undeniably unique. How so? And how does this uniqueness relate to our interest in having a meaningful, lasting life?

    Your Marvelous Brain

    For years man’s brain has been likened to a computer, yet recent discoveries show that the comparison falls far short. “How does one begin to comprehend the functioning of an organ with somewhere in the neighborhood of 50 billion neurons with a million billion synapses (connections), and with an overall firing rate of perhaps 10 million billion times per second?” asked Dr. Richard M. Restak.

    His answer? “The performance of even the most advanced of the neural-network computers . . . has about one ten-thousandth the mental capacity of a housefly.” Consider, then, how much a computer fails to measure up to a human brain, which is so remarkably superior.

    What man-made computer can repair itself, rewrite its program, or improve over the years? When a computer system needs to be adjusted, a programmer must write and enter new coded instructions. Our brain does such work automatically, both in the early years of life and in old age. You would not be exaggerating to say that the most advanced computers are very primitive compared to the brain. Scientists have called it “the most complicated structure known” and “the most complex object in the universe.” Consider some discoveries that have led many to conclude that the human brain is the product of a caring Creator.

    Use It or Lose It

    Useful inventions such as cars and jet planes are basically limited by the fixed

    mechanisms and electrical systems that men design and install. By contrast, our brain is, at the very least, a highly flexible

    biological mechanism or system. It can keep changing according to the way it is used—or abused. Two main factors seem responsible for how our brain develops throughout our lifetime—what we allow to enter it through our senses and what we choose to think about.

    Although hereditary factors may have a role in mental performance, modern research shows that our brain is not fixed by our genes at the time of conception. “No one suspected that the brain was as changeable as science now knows it to be,” writes Pulitzer prize-winning author Ronald Kotulak. After interviewing more than 300 researchers, he concluded: “The brain is not a static organ; it is a constantly changing mass of cell connections that are deeply affected by experience.”— Inside the Brain.

    Still, our experiences are not the only means of shaping our brain. It is affected also by our thinking. Scientists find that the brains of people who remain mentally active have up to 40 percent more connections (synapses) between nerve cells (neurons) than do the brains of the mentally lazy. Neuroscientists conclude: You have to use it or you lose it. What, though, of the elderly? There seems to be some loss of brain cells as a person ages, and advanced age can bring memory loss. Yet the difference is much less than was once believed. A National Geographic

    report on the human brain said: “Older people . . . retain capacity to generate new connections and to keep old ones via mental activity.”

    Recent findings about our brain’s flexibility accord with advice found in the Bible. That book of wisdom urges readers to be ‘transformed by making their mind over’ or to be “made new” through “accurate knowledge” taken into the mind. (Romans 12:2; Colossians 3:10 ) Jehovah’s Witnesses have seen this happen as people study the Bible and apply its counsel. Many thousands—from the whole spectrum of social and educational backgrounds—have done so. They remain distinct individuals, but they have become happier and more balanced, displaying what a first-century writer called “soundness of mind.” (Acts 26:24, 25 ) Improvements like these result largely from one’s making good use of a part of the cerebral cortex located in the front of the head.

    Your Frontal Lobe

    Most neurons in the outer layer of the brain, the cerebral cortex, are not linked directly to muscles and sensory organs. For example, consider the billions of neurons that make up the frontal lobe. (See drawing, page 56.) Brain scans prove that the frontal lobe becomes active when you think of a word or call up memories. The front part of the brain plays a special role in your being you.

    “The prefrontal cortex . . . is most involved with elaboration of thought, intelligence, motivation, and personality. It associates experiences necessary for the production of abstract ideas, judgment, persistence, planning, concern for others, and conscience. . . . It is the elaboration of this region that sets human beings apart from other animals.” (Marieb’s Human Anatomy and Physiology) We certainly see evidence of this distinction in what humans have accomplished in fields such as mathematics, philosophy, and justice, which primarily involve the prefrontal cortex.

    Why do humans have a large, flexible prefrontal cortex, which contributes to higher mental functions, whereas in animals this area is rudimentary or nonexistent? The contrast is so great that biologists who claim that we evolved speak of the “mysterious explosion in brain size.” Professor of Biology Richard F. Thompson, noting the extraordinary expansion of our cerebral cortex, admits: “As yet we have no very clear understanding of why this happened.” Could the reason lie in man’s having been

    created with this peerless brain capacity?

    Unequaled Communication Skills

    Other parts of the brain also contribute to our uniqueness. Behind our prefrontal cortex is a strip stretching across the head—the motor cortex. It contains billions of neurons that connect with our muscles. It too has features that contribute to our being far different from apes or other animals. The primary motor cortex gives us “(1) an exceptional capability to use the hand, the fingers, and the thumb to perform highly dexterous manual tasks, and (2) use of the mouth, lips, tongue, and facial muscles to talk.”—Guyton’s Textbook of Medical Physiology.

    Consider briefly how the motor cortex affects your ability to speak. Over half of it is devoted to the organs of communication. This helps to explain the unparalleled communication skills of humans. Though our hands play a role in communication (in writing, normal gestures, or sign language), the mouth usually plays the major part. Human speech—from a baby’s first word to the voice of an elderly person—is unquestionably a marvel. Some 100 muscles in the tongue, lips, jaw, throat, and chest cooperate to produce countless sounds. Note this contrast: One brain cell can direct 2,000 fibers of an athlete’s calf muscle, but brain cells for the voice box may concentrate on only 2 or 3 muscle fibers. Does that not suggest that our brain is specially equipped for communication?

    Each short phrase that you utter requires a specific pattern of muscular movements. The meaning of a single expression can change depending upon the degree of movement and split-second timing of scores of different muscles. “At a comfortable rate,” explains speech expert Dr. William H. Perkins, “we utter about 14 sounds per second. That’s twice as fast as we can control our tongue, lips, jaw or any other parts of our speech mechanism when we move them separately. But put them all together for speech and they work the way fingers of expert typists and concert pianists do. Their movements overlap in a symphony of exquisite timing.”

    The actual information needed to ask the simple question, “How are you today?” is stored in a part of your brain’s frontal lobe called Broca’s area, which some consider to be your speech center. Nobel

    laureate neuroscientist Sir John Eccles wrote: “No area corresponding to the . . . speech area of Broca has been recognized in apes.” Even if some similar areas are found in animals, the fact is that scientists cannot get apes to produce more than a few crude speech sounds. You, though, can produce complicated language. To do so, you put words together according to the grammar of your language. Broca’s area helps you do that, both in speaking and in writing.

    Of course, you cannot exercise the miracle of speech unless you know at least one language and understand what its words mean. This involves another special part of your brain, known as Wernicke’s area. Here, billions of neurons discern the meaning of spoken or written words. Wernicke’s area helps you to make sense of statements and to comprehend what you hear or read; thus you can learn information and can respond sensibly.

    There is even more to your fluent speech. To illustrate: A verbal “Hello” can convey a host of meanings. Your tone of voice reflects whether you are happy, excited, bored, rushed, annoyed, sad, or frightened, and it may even reveal degrees of those emotional states. Another area of your brain supplies information for the emotional part of speech. So, various parts of your brain come into play when you communicate.

    Chimpanzees have been taught some limited sign language, but their use of it is essentially limited to simple requests for food or other basics. Having worked to teach chimps simple nonverbal communication, Dr. David Premack concluded: “Human language is an embarrassment for evolutionary theory because it is vastly more powerful than one can account for.”

    We might ponder: ‘Why do humans have this marvelous skill to communicate thoughts and feelings, to inquire and to respond?’ The Encyclopedia of Language and Linguistics states that “[human] speech is special” and admits that “the search for precursors in animal communication does not help much in bridging the enormous gap that separates language and speech from nonhuman behaviors.” Professor Ludwig Koehler summarized the difference: “Human speech is a secret; it is a divine gift, a miracle.”

    What a difference there is between an ape’s use of signs and the complex language ability of children! Sir John Eccles referred to what most of us have also observed, an ability “exhibited even by 3-year-old children with their torrent of questions in their desire to understand their world.” He added: “By contrast, apes do not ask questions.” Yes, only humans form questions, including questions about the meaning of life.

    Memory and More!

    When you glance in a mirror, you may think of how you looked when you were younger, even comparing that with what your appearance could be in the years to come or how you would look after applying cosmetics. These thoughts can arise almost unconsciously, yet something very special is occurring, something that no animal can experience.

    Unlike animals, who mainly live and act on present needs, humans can contemplate the past and plan for the

    future . A key to your doing that is the brain’s almost limitless memory capacity. True, animals have a degree of memory, and thus they can find their way back home or recall where food may be. Human memory is far greater. One scientist estimated that our brain can hold information that “would fill some twenty million volumes, as many as in the world’s largest libraries.” Some neuroscientists estimate that during an average life span, a person uses only 1/100 of 1 percent (.0001) of his potential brain capacity. You might well ask, ‘Why do we have a brain with so much capacity that we hardly test a fraction of it in a normal lifetime?’

    Nor is our brain just some vast storage place for information, like a supercomputer. Biology professors Robert Ornstein and Richard F. Thompson wrote: “The ability of the human mind to learn—to store and recall information—is the most remarkable phenomenon in the biological universe. Everything that makes us human—language, thought, knowledge, culture—is the result of this extraordinary capability.”

    Moreover, you have a conscious mind. That statement may seem basic, but it sums up something that unquestionably makes you exceptional. The mind has been described as “the elusive entity where intelligence, decision making, perception, awareness and sense of self reside.” As creeks, streams, and rivers feed into a sea, so memories, thoughts, images, sounds, and feelings flow constantly into or through our mind. Consciousness, says one definition, is “the perception of what passes in a man’s own mind.”

    Modern researchers have made great strides in understanding the physical makeup of the brain and some of the electrochemical processes that occur in it. They can also explain the circuitry and

    functioning of an advanced computer. However, there is a vast difference between brain and computer. With your brain you are conscious and are aware of your being, but a computer certainly is not. Why the difference?

    Frankly, how and why consciousness arises from physical processes in our brain is a mystery. “I don’t see how any science can explain that,” one neurobiologist commented. Also, Professor James Trefil observed: “What, exactly, it means for a human being to be conscious . . . is the only major question in the sciences that we don’t even know how to ask.” One reason why is that scientists are using the brain to try to understand the brain. And just studying the physiology of the brain may not be enough. Consciousness is “one of the most profound mysteries of existence,” observed Dr. David Chalmers, “but knowledge of the brain alone may not get [scientists] to the bottom of it.”

    Nonetheless, each of us experiences consciousness. For example, our vivid memories of past events are not mere stored facts, like computer bits of information. We can reflect on our experiences, draw lessons from them, and use them to shape our future . We are able to consider several future scenarios and evaluate the possible effects of each. We have the capacity to analyze, create, appreciate, and love. We can enjoy pleasant conversations about the past, present, and future . We have ethical values about behavior and can use them in making decisions that may or may not be of immediate benefit. We are attracted to beauty in art and morals. In our mind we can mold and refine our ideas and guess how other people will react if we carry these out.

    Such factors produce an awareness that sets humans apart from other life-forms on earth. A dog, a cat, or a bird looks in a mirror and responds as if seeing another of its kind. But when you look in a mirror, you are conscious of yourself as a being with the capacities just mentioned. You can reflect on dilemmas, such as: ‘Why do some turtles live 150 years and some trees live over 1,000 years, but an intelligent human makes the news if he reaches 100?’ Dr. Richard Restak states: “The human brain, and the human brain alone, has the capacity to step back, survey its own operation, and thus achieve some degree of transcendence. Indeed, our capacity for rewriting our own script and redefining ourselves in the world is what distinguishes us from all other creatures in the world.”

    Man’s consciousness baffles some. The book Life Ascending, while favoring a mere biological explanation, admits: “When we ask how a process [evolution] that resembles a game of chance, with dreadful penalties for the losers, could have generated such qualities as love of beauty and truth, compassion, freedom, and, above all, the expansiveness of the human spirit, we are perplexed. The more we ponder our spiritual resources, the more our wonder deepens.” Very true. Thus, we might round out our view of human uniqueness by a few evidences of our consciousness that illustrate why many are convinced that there must be an intelligent Designer, a Creator, who cares for us.

    Art and Beauty

    “Why do people pursue art so passionately?” asked Professor Michael Leyton in Symmetry, Causality, Mind. As he pointed out, some might say that mental activity such as mathematics confers clear benefits to humans, but why art? Leyton illustrated his point by saying that people travel great distances to art exhibits and concerts. What inner sense is involved? Similarly, people around the globe put attractive pictures or paintings on the walls of their home or office. Or consider music. Most people like to listen to some style of music at home and in their cars. Why? It certainly is not because music once contributed to the survival of the fittest. Says Leyton: “Art is perhaps the most inexplicable phenomenon of the human species.”

    Still, we all know that enjoying art and beauty is part of what makes us feel “human.” An animal might sit on a hill and look at a colorful sky, but is it drawn to beauty as such? We look at a mountain torrent shimmering in the sunshine, stare at the dazzling diversity in a tropical rain forest, gaze at a palm-lined beach, or admire the stars sprinkled across the black velvety sky. Often we feel awed, do we not? Beauty of that sort makes our hearts glow, our spirits soar. Why?

    Why do we have an innate craving for things that, in reality, contribute little materially to our survival? From where do our aesthetic values come? If we do not take into account a Maker who shaped these values at man’s creation, these questions lack satisfying answers. This is also true regarding beauty in morals.

    Moral Values

    Many recognize the highest form of beauty to be fine deeds. For instance, being loyal to principles in the face of persecution, acting unselfishly to relieve others’ suffering, and forgiving someone who hurt us are actions that appeal to the moral sense of thinking people everywhere. This is the kind of beauty mentioned in the ancient Biblical proverb: “The insight of a man certainly slows down his anger, and it is beauty on his part to pass over transgression.” Or as another proverb observes: “The desirable thing in earthling man is his loving-kindness.”— Proverbs 19:11, 22 .

    We all know that some people, and even groups, ignore or trample on elevated morals, but the majority do not. From what source do the moral values found in virtually all areas and in all periods come? If there is no Source of morality, no Creator, did right and wrong simply originate with people, human society? Consider an example: Most individuals and groups hold murder to be wrong. But one could ask, ‘Wrong in comparison to what?’ Obviously there is some sense of morality that underlies human society in general and that has been incorporated into the laws of many lands. What is the source of this standard of morality? Could it not be an intelligent Creator who has moral values and who placed the faculty of conscience, or ethical sense, in humans?—Compare Romans 2:14, 15 .

    You Can Contemplate the Future and Plan for It

    Another facet of human consciousness is our ability to consider the future . When asked whether humans have traits that distinguish them from animals, Professor Richard Dawkins acknowledged that man has, indeed, unique qualities. After mentioning “the ability to plan ahead using conscious, imagined foresight,” Dawkins added: “Short-term benefit has always been the only thing that counts in evolution; long-term benefit has never counted. It has never been possible for something to evolve in spite of being bad for the immediate short-term good of the individual. For the first time ever, it’s possible for at least some people to say, ‘Forget about the fact that you can make a short-term profit by chopping down this forest; what about the long-term benefit?’ Now I think that’s genuinely new and unique.”

    Other researchers confirm that humans’ ability for conscious, long-term planning is without parallel. Neurophysiologist William H. Calvin notes: “Aside from hormonally triggered preparations for winter and mating, animals exhibit surprisingly little evidence of planning more than a few minutes ahead.” Animals may store food before a cold season, but they do not think things through and plan. By contrast, humans consider the future , even the distant future . Some scientists contemplate what may happen to the universe billions of years hence. Did you ever wonder why man—so different from animals—is able to think about the future and lay out plans?

    The Bible says of humans: “Even time indefinite [the Creator] has put in their heart.” The Revised Standard Version

    renders it: “He has put eternity into man’s mind.” (Ecclesiastes 3:11 ) We use this distinctive ability daily, even in as common an act as glancing in a mirror and thinking what our appearance will be in 10 or 20 years. And we are confirming what Ecclesiastes 3:11 says when we give even passing thought to such concepts as the infinity of time and space. The mere fact that we have this ability harmonizes with the comment that a Creator has put “eternity into man’s mind.”

    Drawn to a Creator

    Many people, however, are not satisfied fully by enjoying beauty, doing good to fellowmen, and thinking about the future . “Strangely enough,” notes Professor C. Stephen Evans, “even in our most happy and treasured moments of love, we often feel something is missing. We find ourselves wanting more but not knowing what is the more we want.” Indeed, conscious humans—unlike the animals with which we share this planet—feel another need.

    “Religion is deeply rooted in human nature and experienced at every level of economic status and educational background.” This summed up the research that Professor Alister Hardy presented in The Spiritual Nature of Man. It confirms what numerous other studies have established—man is God-conscious. While individuals may be atheists, whole nations are not. The book Is God the Only Reality? observes: “The religious quest for meaning . . . is the common experience in every culture and every age since the emergence of humankind.”

    From where does this seemingly inborn awareness of God come? If man were merely an accidental grouping of nucleic acid and protein molecules, why would these molecules develop a love of art and beauty, turn religious, and contemplate eternity?

    Sir John Eccles concluded that an evolutionary explanation of man’s existence “fails in a most important respect. It cannot account for the existence of each one of us as unique self-conscious beings.” The more we learn about the workings of our brain and mind, the easier it is to see why millions of people have concluded that man’s conscious existence is evidence of a Creator who cares about us.

    In the next chapter, we will see why people of all walks of life have found that this rational conclusion lays the basis for finding satisfying answers to the vital questions, Why are we here, and where are we going?

    [Box on page 51]

    Chess Champion Versus Computer

    When the advanced computer Deep Blue vanquished the world champion chess player, the question arose, “Aren’t we forced to conclude that Deep Blue must have a mind?”

    Professor David Gelernter of Yale University replied: “No. Deep Blue is just a machine. It doesn’t have a mind any more than a flowerpot has a mind. . . . Its chief meaning is this: that human beings are champion machine builders.”

    Professor Gelernter pointed to this major difference: “The brain is a machine that is capable of creating an ‘I.’ Brains can summon mental worlds into being, and computers can’t.”

    He concluded: “The gap between human and [computer] is permanent and will never be closed. Machines will continue to make life easier, healthier, richer and more puzzling. And human beings will continue to care, ultimately, about the same things they always have: about themselves, about one another and, many of them, about God. On those terms, machines have never made a difference. And they never will.”

    [Box on page 53]

    Supercomputer Equals Snail

    “Today’s computers are not even close to a 4-year-old human in their ability to see, talk, move, or use common sense. One reason, of course, is sheer computing power. It has been estimated that the information processing capacity of even the most powerful supercomputer is equal to the nervous system of a snail—a tiny fraction of the power available to the supercomputer inside [our] skull.”—Steven Pinker, director of the Center for Cognitive Neuroscience at the Massachusetts Institute of Technology.

    [Box on page 54]

    “The human brain is composed almost exclusively of the [cerebral] cortex. The brain of a chimpanzee, for example, also has a cortex, but in far smaller proportions. The cortex allows us to think, to remember, to imagine. Essentially, we are human beings by virtue of our cortex.”—Edoardo Boncinelli, director of research in molecular biology, Milan, Italy.

    [Box on page 55]

    From Particle Physics to Your Brain

    Professor Paul Davies reflected on the ability of the brain to handle the abstract field of mathematics. “Mathematics is not something that you find lying around in your back yard. It’s produced by the human mind. Yet if we ask where mathematics works best, it is in areas like particle physics and astrophysics, areas of fundamental science that are very, very far removed from everyday affairs.” What does that imply? “It suggests to me that consciousness and our ability to do mathematics are no mere accident, no trivial detail, no insignificant by-product of evolution.”— Are We Alone?

    [Box/Pictures on page 56, 57]

    (For fully formatted text, see publication)

    Frontal lobe

    Prefrontal cortex

    Broca’s area

    Wernicke’s area

    Motor cortex

    ● The Cerebral Cortex is the surface region of the brain that is most strongly linked to intelligence. A human’s cerebral cortex, if flattened, would cover four pages of typing paper; a chimpanzee’s would cover only one page; and a rat’s would cover a postage stamp.— Scientific American.

    [Box on page 58]

    Every People Has One

    Throughout history, whenever one people encountered another, each found the other speaking a language. The Language Instinct comments: “No mute tribe has ever been discovered, and there is no record that a region has served as a ‘cradle’ of language from which it spread to previously languageless groups. . . . The universality of complex language is a discovery that fills linguists with awe, and is the first reason to suspect that language is . . . the product of a special human instinct.”

    [Box on page 59]

    Language and Intelligence

    Why does human intelligence far surpass that of animals, such as apes? A key is our use of syntax—putting sounds together to make words and using words to make sentences. Theoretical neurophysiologist Dr. William H. Calvin explains:

    “Wild chimpanzees use about three dozen different vocalizations to convey about three dozen different meanings. They may repeat a sound to intensify its meaning, but they do not string together three sounds to add a new word to their vocabulary.

    “We humans also use about three dozen vocalizations, called phonemes. Yet only their combinations have content: we string together meaningless sounds to make meaningful words.” Dr. Calvin noted that “no one has yet explained” the leap from the animals’ “one sound/one meaning” to our uniquely human capacity to use syntax.

    [Box on page 60]

    You Can Do More Than Doodle

    “Is only man, Homo sapiens, capable of communicating by language? Clearly the answer must depend on what is meant by ‘language’—for all the higher animals certainly communicate with a great variety of signs, such as gestures, odours, calls, cries and songs, and even the dance of the bees. Yet animals other than man do not appear to have structured grammatical language. And animals do not, which may be highly significant, draw representational pictures. At best they only doodle.”—Professors R. S. and D. H. Fouts.

    [Box on page 61]

    “Turning to the human mind, we also find structures of marvellous intricacy,” notes Professor A. Noam Chomsky. “Language is a case in point, but not the only one. Think of the capacity to deal with abstract properties of the number system, [which seems] unique to humans.”

    [Box on page 62]

    “Endowed” to Ask

    Concerning the future of our universe, physicist Lawrence Krauss wrote: “We are emboldened to ask questions about things we may never see directly because we can ask them. Our children, or their children, will one day answer them. We are endowed with imagination.”

    [Box on page 69]

    If the universe and our being alive in it are accidental, our lives can have no lasting

    meaning. But if our life in the universe results from design, there must be a satisfying meaning to it.

    [Box on page 72]

    From Dodging Saber-Toothed Tigers?

    John Polkinghorne, of the University of Cambridge, England, observed:

    “Theoretical physicist Paul Dirac discovered something called quantum field theory which is fundamental to our understanding of the physical world. I can’t believe Dirac’s ability to discover that theory, or Einstein’s ability to discover the general theory of relativity, is a sort of spin-off from our ancestors having to dodge saber-toothed tigers. Something much more profound, much more mysterious, is going on. . . .

    “When we look at the rational order and transparent beauty of the physical world, revealed through physical science, we see a world shot through with signs of mind. To a religious believer, it is the mind of the Creator that is being discerned in that way.”— Commonweal.

    [Picture on page 63]

    Only humans form questions. Some are questions about the meaning of life

    [Picture on page 64]

    Unlike the animals, humans have an awareness about themselves and about the future

    [Picture on page 70]

    Humans uniquely appreciate beauty, think about the future , and are drawn to a Creator

    No comments:

    Post a Comment