As you lecture, you keep watching the faces, and information keeps coming back to you all the time.

A lecture is much more of a dialogue than many of you probably realize.

We have fallen in love with the body. That's that thing that looks back at us from the mirror. That's the repository of that lovely identity that you keep chasing all your life.

I keep coming back to you in my head, but you couldn't know that, and I have no carbons.

The only use for an atomic bomb is to keep somebody else from using one.

You see, every creature alive on the earth today represents an unbroken line of life that stretches back to the first primitive organism to appear on this planet; and that is about three billion years.