"All our dignity consists in thought. It is by this that we must elevate ourselves, and not by space and time, which we cannot fill. Let us endeavor, then, to think well; this is the principle of moral…"

"Our nature is corrupted, and we are full of pride and self-love."

"The true good is to be found in God alone."

"If I had more time, I would have written a shorter letter."

"It is not certain that everything is uncertain."