I am convinced we do not only love ourselves in others but hate ourselves in others too.

Man is a masterpiece of creation . . .

In the world we live in, one fool makes many fools, but one sage only a few sages.

Deliberate virtue is never worth much: The virtue of feeling or habit is the thing.

All mathematical laws which we find in Nature are always suspect to me, in spite of their beauty. They give me no pleasure. They are merely auxiliaries. At close range it is all not true.

To receive applause for works which do not demand all our powers hinders our advance towards a perfecting of our spirit. It usually means that thereafter we stand still.

As nations improve, so do their gods.