I define nothing. Not beauty, not patriotism. I take each thing as it is, without prior rules about what it should be.

The world has never had a good definition of the word liberty ... We all declare for liberty; but in using the same word we do not all mean the same thing.

The task is not just to understand the world but to change it.

I now understand that my welfare is only possible if I acknowledge my unity with all the people of the world without exception.

The salvation of the world depends on the men who will not take evil good-humouredly, and whose laughter destroys the fool instead of encouraging him.

There is a sufficiency in the world for man's need but not for man's greed.