The command to be free is a double bind

The distinguishing mark of true adventures, is that it is often no fun at all while they are actually happening.

Life is insanely robust, though we can make species go extinct, and this is the bad thing. So I always make the point that you can't say, 'Is it too late?' That is the terrible question, because either answer promotes inaction. If it's too late, you don't need to act; if it's not too late, you don't need to act.

It's too bad we only had the courage to live our lives fully in dreams.

It's fragile what we know. It's gone every time we forget. Then someone has to learn it all over again.

A lot of scientists act on their beliefs and so do things that look crazy to the rest of us.

None of us know our real names.