"The secret of getting ahead is getting started."

"The main point is to be honest with yourself, and to admit when you are wrong."

"It is very hard to be famous and still do good work."

"It is not good to try to stop knowledge from going forward. Ignorance is never better than knowledge."

"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."