Paul Tillich

Astonishment is the root of philosophy.

The courage to be is rooted in the God who appears when God has disappeared in the anxiety of doubt.

Boredom is rage spread thin.

To me, tattoos are a way of people being able to express themselves and have other people look at them and get a little insight into who they are, without ever even saying a word to them.

But the battles against loneliness that I fought when I was 16 are very different from those I fought when I was 27, and those are very different from the ones I fight at 44.

I didn't really realize that writing... would be fun and people would pay you to do it. Being an astronaut is a glory profession, and so is writing, in a way.