We enter the world alone, we leave the world alone.

Wild animals never kill for sport. Man is the only one to whom the torture and death of his fellow creatures is amusing in itself.

To deny the freedom of the will is to make morality impossible.

In everyday things the law of sacrifice takes the form of positive duty.

The secret of a person's nature lies in their religion and what they really believes about the world and their place in it.

Science rests on reason and experiment, and can meet an opponent with calmness but a belief is always sensitive.

Superior strength is found in the long run to lie with those who had right on their side.