After all, is our idea of God anything more than personified incomprehensibility?

What most clearly characterizes true freedom and its true employment is its misemployment.

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?

The wisdom of providence is as much revealed in the rarity of genius, as in the circumstance that not everyone is deaf or blind.

It is a sure evidence of a good book if it pleases us more and more as we grow older.

The most entertaining surface on earth is the human face.

Be attentive, feel nothing in vain, measure and compare: this is the whole law of philosophy.