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.

Mysteries do not lose their poetry when solved. Quite the contrary; the solution often turns out more beautiful than the puzzle and, in any case, when you have solved one mystery you uncover others, perhaps to inspire greater poetry

The cynic about human nature might say that religious morality is an effective way of keeping people in line. The threat of hell, the reward of heaven, but the rules of the holy books are out of date and often barbaric.

I don't think God is an explanation at all. It's simply redescribing the problem.

The important thing to remember about mathematics is not to be frightened

There is a whole field of inquiry that has come up in the last 30 or 40 years - some call it sociobiology or evolutionary psychology - relating to where we get our moral sense and why we value the idea of altruism, and locating both answers in behavioral adaptations for the preservation of our genes.

When you plant a fertile meme in my mind you literally parasitize my brain, turning it into a vehicle for the meme's propagation in just the way that a virus may parasitize the genetic mechanism of a host cell.