Earnestness is enthusiasm tempered by reason.

It is dangerous to explain too clearly to man how like he is to the animals without pointing out his greatness. It is also dangerous to make too much of his greatness without his vileness. It is still more dangerous to leave him in ignorance of both, but it is most valuable to represent both to him. Man must not be allowed to believe that he is equal either to animals or to angels, nor to be unaware of either, but he must know both.

When malice has reason on its side, it looks forth bravely, and displays that reason in all its luster. When austerity and self-denial have not realized true happiness, and the soul returns to the dictates of nature, the reaction is fearfully extravagant.

Nothing is so insufferable to man as to be completely at rest, without passions, without business, without diversion, without study. He then feels his nothingness, his forlornness, his insufficiency, his dependence, his weakness, his emptiness. There will immediately arise from the depth of his heart weariness, gloom, sadness, fretfulness, vexation, despair.

Force rules the world-not opinion; but it is opinion that makes use of force.

There is a God-shaped vacuum in every heart.

(Man,) the glory and the scandal of the universe.