“After sleeping through a hundred million centuries we have finally opened our eyes on a sumptuous planet, sparkling with color, bountiful with life. Within decades we must close our eyes again. Isn’t it a noble, an enlightened way of spending our brief time in the sun, to work at understanding the universe and how we have come to wake up in it? This is how I answer when I am asked—as I am surprisingly often—why I bother to get up in the mornings.”

“How pleased we are to have our eyes opened but how easily we close them again.”

“It feels like a moment I've lived a thousand times before, as if everything is familiar, right up to the moment of my death, that it will happen again an infinite number of times, that we will meet, marry, have our children, succeed in the ways we have, fail in the ways we have, all exactly the same, always unable to change a thing. I am again at the bottom of an unstoppable wheel, and when I feel my eyes close for death, as they have and will a thousand times, I awake.”

“[I]n science we have to be particularly cautious about 'why' questions. When we ask, 'Why?' we usually mean 'How?' If we can answer the latter, that generally suffices for our purposes. For example, we might ask: 'Why is the Earth 93 million miles from the Sun?' but what we really probably mean is, 'How is the Earth 93 million miles from the Sun?' That is, we are interested in what physical processes led to the Earth ending up in its present position. 'Why' implicitly suggests purpose, and when we try to understand the solar system in scientific terms, we do not generally ascribe purpose to it.”

“A man must find time for himself. Time is what we spend our lives with. If we are not careful we find others spending it for us. . . . It is necessary now and then for a man to go away by himself and experience loneliness; to sit on a rock in the forest and to ask of himself, 'Who am I, and where have I been, and where am I going?' . . . If one is not careful, one allows diversions to take up one's time—the stuff of life.”

“From time to time it's fun to close our eyes, and in that dark say to ourselves, 'I am the sorcerer, and when I open my eyes I shall see a world that I have created, and for which I and only I am completely responsible.' Slowly then, eyelids open like curtains lifting stage-center. And sure enough, there's our world, just the way we've built it.”