With the fearful strain that is on me night and day, if I did not laugh I should die.

I decided to sell my drawings. However, I didn't want people to buy my drawings because the professor of physics isn't supposed to be able to draw - isn't that wonderful - so I made up a false name.

To love someone deeply gives you strength. Being loved by someone deeply gives you courage.

Nearly every man who develops an idea works it up to the point where it looks impossible, and then he gets discouraged. That's not the place to become discouraged.

Man, alone, has the power to transform his thoughts into physical reality; man, alone, can dream and make his dreams come true.