“I'd like to widen people's awareness of the tremendous timespan lying ahead--for our planet, and for life itself. Most educated people are aware that we're the outcome of nearly 4bn years of Darwinian selection, but many tend to think that humans are somehow the culmination. Our sun, however, is less than halfway through its lifespan. It will not be humans who watch the sun's demise, 6bn years from now. Any creatures that then exist will be as different from us as we are from bacteria or amoebae.”

“Increasingly we live in a world of concrete, tarmac, television, and computer screens. These are great mechanical and electronic constructs of the human intellect--but they blot out our view of the rising and setting sun and keep our feet from being grounded in the earth, which in many cultures is a sacred act of communion”

“I do not accept any absolute formulas for living. No preconceived code can see ahead to everything that can happen in a man's life. As we live, we grow and our beliefs change. They must change. So I think we should live with this constant discovery. We should be open to this adventure in heightened awareness of living. We should stake our whole existence on our willingness to explore and experience. ”

“Music is the pleasure the human mind experiences from counting without being aware that it is counting.”

“You always know more than you think you know without being aware of it. You always remember best what has hurt most.Memory is a reflex of the pain. Knowledge is the memory of the pain combined with the unconsciousness which we 'rationalize' via dreams or by means of reading literature. It is impossible to learn from someone else's experience unless we don't assume this experience as our own's, which we can achieve only by living it anew and from scratch. We can not live our lives at someone else's expense. Only life fraught with dangers and risks and lived as your own's deserves its name. Only selfish people do not live their lives as if they do not belong entirely to them. Cowardice equals a life that you refuse to live at its fullest and at its most dangerous.”

“I suspect there could be life and intelligence out there in forms that we can't conceive. And there could, of course, be forms of intelligence beyond human capacity – beyond as much as we are beyond a chimpanzee”

“Imagine the terrestrial timespan as an outstretched arm: a single swipe of an emery-board, across the nail of the third finger, erases human history. We haven't been around for very long. And we've turned the earth's hair white. Sh e seemed to have eternal youth but now she's ageing awful fast, like an addict, like a waxless candle. Jesus, have you seen her recently? we used to live and die without any sense of the planet getting older, of mother earth getting older, living and dying. We used to live outside history. But now we're all coterminous. We're inside history now all right, on its leading edge, with the wind ripping past our ears. Hard to love, when you're bracing yourself for impact. And maybe love can't bear it either, and flees all planets when they reach this condition, when they get to the end of their twentieth centuries.”