The fact that we need to refine what we mean by “common sense” in order to accommodate our understanding of nature is, to me, one of the most remarkable and liberating aspects of science. Reality liberates us from the biases and misconceptions that have arisen because our intellects evolved through our animal ancestors, whose survival was based on whether predators might lurk behind trees or in caves and not on understanding the wave function of electrons in atoms. Our modern conception of the universe is so foreign to what even scientists generally believed a mere century ago that it is a tribute to the power of the scientific method and the creativity and persistence of humans who want to understand it. That is worth celebrating. As I describe in this book, the question and the possible answers to how something might come from nothing are even more interesting than merely the possibility of galaxies manifesting from empty space. Science provides a possible road map for the creation of space (and time) itself — and perhaps also an understanding of how the laws of physics that govern the dynamics of space and time can arise haphazardly.

Science is what we have learned about how to keep from fooling ourselves.

it is not science that has diminished human beings or divorced us from divinity. On the contrary, the new discoveries of science “rejoin us to the ancients” by enabling us to recognize in this whole universe “a reflection magnified of our own most inward nature;

But doing so, controlling our own fate, requires that a large fraction of us understand and appreciate science: How it operates. What it teaches us about the universe, the Earth, and life. What it can achieve. What its limitations are, due to inadequate knowledge or technology. How those limitations may be overcome. How we transition from speculation to educated guess to truth. How extremely rare are revolutions in which our perceived truth changes, yet how very important. I hope this book contributes to that understanding.

Science may have alleviated the miseries of disease and drudgery and provided an array of gadgetry for our entertainment and convenience, but it has left us in a world without wonder. Our sunsets have been reduced to wavelengths and frequencies. The complexities of the universe have been shredded into mathematical equations. Even our self-worth as human beings has been destroyed. Science proclaims that Planet Earth and its inhabitants are a meaningless speck in the grand scheme. A cosmic accident.” He paused. “Even the technology that promises to unite us, divides us. Each of us is now electronically connected to the globe, and yet we feel utterly alone. We are bombarded with violence, division, fracture, and betrayal. Skepticism has become a virtue. Cynicism and demand for proof has become enlightened thought. Is it any wonder that humans now feel more depressed and defeated than they have at any point in human history? Does science hold anything sacred? Science looks for answers by probing our unborn fetuses. Science even presumes to rearrange our own DNA. It shatters God’s world into smaller and smaller pieces in quest of meaning . . . and all it finds is more questions.

We believe that it is possible for scientific work to gain some knowledge about the reality of the world, by means of which we can increase out power and in accordance with which we can arrange our life. If this belief is an illusion, then we are in the same position as you. But science has given us evidence by its numerous and important successes that it is no illusion.

I don't myself think much of science as a phase of human development. It has given us a lot of ingenious toys; they take our attention away from the real problems, of course, and since the problems are insoluble, I suppose we ought to be grateful for distraction. But the fact is, the human mind, the individual mind, has always been made more interesting by dwelling on the old riddles, even if it makes nothing of them. Science hasn't given us any new amazements, except of the superficial kind we get from witnessing dexterity and sleight-of-hand. It hasn't given us any richer pleasures, as the Renaissance did, nor any new sins-not one! Indeed, it takes our old ones away. It's the laboratory, not the Lamb of God, that taketh away the sins of the world. You'll agree there is not much thrill about a physiological sin. We were better off when even the prosaic matter of taking nourishment could have the magnificence of a sin. I don't think you help people by making their conduct of no importance-you impoverish them. As long as every man and woman who crowded into the cathedrals on Easter Sunday was a principal in a gorgeous drama with God, glittering angels on one side and the shadows of evil coming and going on the other, life was a rich thing. The king and the beggar had the same chance at miracles and great temptations and revelations. And that's what makes men happy, believing in the mystery and importance of their own little individual lives. It makes us happy to surround our creature needs and bodily instincts with as much pomp and circumstance as possible. Art and religion (they are the same thing, in the end, of course) have given man the only happiness he has ever had.

Science is nothing but trained and organized common sense, differing from the latter only as a veteran may differ from a raw recruit: and its methods differ from those of common sense only as far as the guardsman's cut and thrust differ from the manner in which a savage wields his club.

The point, of course, is that science increasingly allows us to identify aspects of our minds that cause us to deviate from norms of factual and moral reasoning — norms which, when made explicit, are generally acknowledged to be valid by all parties.

Science is no inexorable march to truth, mediated by the collection of objective information and the destruction of ancient superstition. Scientists, as ordinary human beings, unconsciously reflect in their theories the social and political constraints of their times.

Understanding human nature must be the basis of any real improvement in human life. Science has done wonders in mastering the laws of the physical world, but our own nature is much less understood, as yet, than the nature of stars and electrons. When science learns to understand human nature, it will be able to bring a happiness into our lives which machines and the physical sciences have failed to create.

The fact that the universe is illuminated where you stand — that your thoughts and moods and sensations have a qualitative character in this moment — is a mystery, exceeded only by the mystery that there should be something rather than nothing in the first place. Although science may ultimately show us how to truly maximize human well-being, it may still fail to dispel the fundamental mystery of our being itself. That doesn’t leave much scope for conventional religious beliefs, but it does offer a deep foundation for a contemplative life. Many truths about ourselves will be discovered in consciousness directly or not discovered at all.

One of the reasons for its success is that science has a built-in, error-correcting machinery at its very heart. Some may consider this an overbroad characterization, but to me every time we exercise self-criticism, every time we test our ideas against the outside world, we are doing science. When we are self-indulgent and uncritical, when we confuse hopes and facts, we slide into pseudoscience and superstition.

We must surrender our skepticism only in the face of rock-solid evidence. Science demands a tolerance for ambiguity. Where we are ignorant, we withhold belief. Whatever annoyance the uncertainty engenders serves a higher purpose: It drives us to accumulate better data. This attitude is the difference between science and so much else. Science offers little in the way of cheap thrills. The standards of evidence are strict. But when followed they allow us to see far, illuminating even a great darkness.