It takes a vice to check a vice, and virtue is the by-product of a stalemate between opposite vices.

...the majority of people cannot endure the bareness and futility of their lives unless they have some ardent dedication, or some passionate pursuit in which they can lose themselves.

A plant needs roots in order to grow. With man it is the other way around: only when he grows does he have roots and feels at home in the world.

It is easier to love humanity as a whole than to love one's neighbor.

The only way to predict the future is to have power to shape the future.

The aspiration toward freedom is the most essentially human of all human manifestations.

To learn you need a certain degree of confidence, not too much and not too little. If you have too little confidence, you will think you can't learn. If you have too much, you will think you don't have to learn.