Religions are not proved, are not demonstrated, are not established, are not overthrown by logic! They are of all the mysteries of nature and the human mind, the most mysterious and most inexplicable; they are of instinct and not of reason.

There is no man more complete than the one who travelled a lot, who changed the shape of his thoughts and his life twenty times.

Good manners require space and time.

If greatness of purpose, smallness of means, and astonishing results are the three criteria of a human genius, who could dare compare any great man in history with Muhammad?

When a dog is in your life, there is always a reason to laugh.

Philosophy is the rational expression of genius.

Radicalism is but the desperation of logic.