Children are the keys of paradise.

...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.

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

The atheist is a religious person. He believes in atheism as though it were a new religion. According to Renan, "The day after that on which the world should no longer believe in God, atheists would be the wretchedest of all men."

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

Nonconformists travel as a rule in bunches. You rarely find a nonconformist who goes it alone. And woe to him inside a nonconformist clique who does not conform with nonconformity.

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