The art of revolutionizing and overturning states is to undermine established customs, by going back to their origin, in order to mark their want of justice.

Earnestness is enthusiasm tempered by reason.

I maintain that, if everyone knew what others said about him, there would not be four friends in the world.

We know that there is an infinite, and we know not its nature. As we know it to be false that numbers are finite, it is therefore true that there is a numerical infinity. But we know not of what kind; it is untrue that it is even, untrue that it is odd; for the addition of a unit does not change its nature; yet it is a number, and every number is odd or even (this certainly holds of every finite number). Thus we may quite well know that there is a God without knowing what He is.

Man is but a reed, the most feeble thing in nature, but he is a thinking reed.

Fire. God of Abraham, God of Isaac, God of Jacob, not of the philosophers and the scholars. I will not forget thy word. Amen.

No one is ignorant that there are two avenues by which opinions are received into the soul, which are its two principal powers: the understanding and the will.