Tolerance is a proof of distrust in one's own ideals.

In constructing concepts, we overlook the fact that no two things are the same. There is no such thing as the concept of a leaf, only billions and billions of leaves.

The spiritualization of sensuality is called love: it is a great triumph over Christianity.

It is doubtful whether anyone who has travelled widely has found anywhere in the world regions more ugly than in the human face.

Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you.

Love is blind; friendship closes its eyes.

Impoliteness is frequently the sign of an awkward modesty that loses its head when surprised and hopes to conceal this with rudeness.