Go as far as you can, [young scientists]. The world needs you badly.

The laws of biology are written in the language of diversity.

I like what Abba Eban once said during the 1967 war. He said, "When all else fails, men turn to reason."

I think we will make it. Because one quality people have - certainly Americans have it - is that they can adapt when they see necessity staring them in the face. What to avoid is what someone once called the definition of hell: truth realized too late.

People need a sacred narrative. They must have a sense of larger purpose, in one form or another, however intellectualized. They will find a way to keep ancestral spirits alive.

Search until you find a passion and go all out to excel in its expression.

We exist in a bizarre combination of Stone Age emotions, medieval beliefs, and god-like technology.