If there is no God, then man sometimes thinks he is god, and sometimes tries to live like a god.

The human spirit needs to accomplish, to achieve, to triumph to be happy.

I always assumed scientists were free to ask any question, pursue any line of inquiry without fear or reprisal.

I think, there are many people who are much smarter than I am, and many, many, many who are much harder-working than I am, but in terms of the range of my activities, they're unique.

I have to tell you I never in my life anticipated getting this old, this fast. It seems as if I were 25 just a few days ago.

I feel as if I'm in on a pass and am damn lucky to have whatever I have. It could all be taken away in a second.

It's amazing what ordinary people can do if they set out without preconceived notions.