"I have been very lucky in my life. I have always been able to do what I wanted to do, and I have always been able to do it with people I liked."

"I consider myself a lucky man who did not have to choose between going to war and doing something else. I just did what I was doing."

"I am not afraid of death, because I know that I have lived a full life."

"The fundamental problem is that we do not know enough to do a good job."

"The best way to understand something is to try to explain it to someone else."