he's incapable of suffering for a long time, or being happy for a long time. Which means that he's incapable of anything really worth while.

Alas, after a certain age every man is responsible for his face.

... it is true that I do not respect [human life] more than I respect my own life. And if it is easy for me to kill, that is because it is difficult for me to die.

He who despairs of the human condition is a coward, but he who has hope for it is a fool.

I realized then that a man who had lived only one day could easily live for a hundred years in prison. He would have enough memories to keep him from being bored

Virtue cannot separate itself from reality without becoming a principle of evil.

After all manner of professors have done their best for us, the place we are to get knowledge is in books. The true university of these days is a collection of books.