I'm not studying everything that can go wrong. What I'm studying is how much love there can be, even when everything appears to be going wrong.

I grew up in a very rationalist household. My father, in particular, came from that mid-century tradition of thinking science will ultimately explain everything.

When you believe that you cannot stitch your own heart back together, go to work on the hearts of other people; there is no surer way to repair yourself than to repair them.

I had known a couple of people who had died, but the loss of my mother contained something of the profoundly unknowable.

I think morality is more important than ever before. As we gain more power, the question of what we do with it becomes more and more crucial, and we are very close to really having divine powers of creation and destruction. The future of the entire ecological system and the future of the whole of life is really now in our hands. And what to do with it is an ethical question and also a scientific question.

Listen to the people who love you. Believe that they are worth living for even when you don't believe it.

Science still won't explain the mysterious nature of love and despair.