Two radical ideas have been introduced into human thought. One of them is that energy and matter are pretty much the same sort of stuff. That's Einstein. The other is that revenge is a bad idea. Revenge is an enormously popular idea but, of course, Jesus came along with the radical idea of forgiveness. If you're insulted, you have to square accounts. So this invention by Jesus is as radical as Einstein's.

Einstein's E=mc2 is an extraordinary concept. So radical: matter and energy are two phases of the same sort of general stuff. There's only one other idea that radical: Forgive us our trespasses as we forgive those who trespass against us.

Everything that ever has been always will be, and everything that ever will be always has been.

Evolution is so creative. That's how we got giraffes.

Mere opinions, in fact, were as likely to govern people's actions as hard evidence, and were subject to sudden reversals as hard evidence could never be. So the Galapagos Islands could be hell in one moment and heaven in the next, and Julius Caesar could be a statesman in one moment and a butcher in the next, and Ecuadorian paper money could be traded for food, shelter, and clothing in one moment and line the bottom of a birdcage in the next, and the universe could be created by God Almighty in one moment and by a big explosion in the next--and on and on.

The heartbreaking necessity of lying about reality and the heartbreaking impossibilty of lying about it

My soul seemed as foul as smoke from burning cat fur.