If another Messiah was born he could hardly do so much good as the printing-press.

The highest level than can be reached by a mediocre but experienced mind is a talent for uncovering the weaknesses of those greater than itself.

A person reveals his character by nothing so clearly as the joke he resents.

We accumulate our opinions at an age when our understanding is at its weakest.

I forget most of what I read, just as I do most of what I have eaten, but I know that both contribute no less to the conservation of my mind and my body on that account.

Man is a masterpiece of creation, if only because no amount of determinism can prevent him from believing that he acts as a free being.

It is in the gift for employing all the vicissitudes of life to one's own advantage and to that of one's craft that a large part of genius consists.