I believe that man is in the last resort so free a being that his right to be what he believes himself to be cannot be contested.

Brevity: To say at once whatever is to be said.

He was always smoothing and polishing himself, and in the end he became blunt before he was sharp.

There is no greater impediment to progress in the sciences than the desire to see it take place too quickly.

Great men too make mistakes, and many among them do it so often that one is almost tempted to call them little men.

Just as there are polysyllabic words that say very little, so there are also monosyllabic words of infinite meaning.

We now possess four principles of morality: 1) a philosophical: do good for its own sake, out of respect for the law; 2) a religious: do good because it is God's will, out of love of God; 3) a human: do good because it will promote your happiness, out of self-love; 4) a political: do good because it will promote the welfare of the society of which you are a part, out of love of society having regard to yourself. But is this not all one single principle, only viewed from different sides?