I used to go away for weeks in a state of confusion.

It would be better if you began to teach others only after you yourself have learned something.

To dwell on the things that depress or anger us does not help in overcoming them. One must knock them down alone.

The conscientious objector is a revoultionary. On deciding to disobey the law he sacrifices his personal interests to the most important cause of working for the betterment of society.

The theoretical idea ... does not arise apart from and independent of experience; nor can it be derived from experience by a purely logical procedure. It is produced by a creative act. Once a theoretical idea has been acquired, one does well to hold fast to it until it leads to an untenable conclusion.

I was very pleased with your kind letter. Until now I never dreamed of being something like a hero. But since you've given me the nomination I feel that I am one.

Is it not a terrible thing to be forced by society to do things which all of us as individuals regard as abominable crimes?