I overcame the nightmares because of my dreams.

When you inoculate children with a polio vaccine, you don't sleep well for two or three months.

The art of science is as important as so-called technical science. You need both. It's this combination that must be recognized and acknowledged and valued.

If all insects disappeared, all life on earth would perish. If all humans disappeared, all life on earth would flourish.

I have come to recognize evolution not only as an active process that I am experiencing at the time, but as something I can guide by the choices I make.

Nothing happens quite by chance. It's a question of accretion of information and experience.

I think of the need for more wisdom in the world, to deal with the knowledge that we have. At one time we had wisdom, but little knowledge. Now we have a great deal of knowledge, but do we have enough wisdom to deal with that knowledge?