When I met scientists, I found them to be as various as any other group of people.

You have to have a darkness...for the dawn to come. You have to have experienced difficulties and challenges to fully appreciate and be grateful for success.

I just don't think of age and time in respect of years. I have too much experience of people in their seventies who are vigorous and useful and people who are thirty-five who are in lousy physical shape and can't think straight. I don't think age has that much to do with it.

It's important not to base your ambition on anybody else's history, but to figure out how best to use your own particular personality and understanding of yourself to help tell other people's stories.

I was completely unprepared for the public spectacle my private life became, and didn't like it a bit.

If I were a serious person, I'd probably have a real job.

I am not the first man who wanted to make changes in his life at 60 and I won't be the last. It is just that others can do it with anonymity.