Without the errors which lie in the assumption of morality, man would have remained an animal.

Nothing can be done about it: every master has but a single pupil--and he will not stay loyal to him--for he is also destined to become a master.

Little prigs and three-quarter madmen may have the conceit that the laws of nature are constantly broken for their sakes.

Life is an instinct for growth, for survival, for the accumulation of forces, for power.

Out of damp and gloomy days, out of solitude, out of loveless words directed at us, conclusions grow up in us like fungus: one morning they are there, we know not how, and they gaze upon us, morose and gray. Woe to the thinker who is not the gardener but only the soil of the plants that grow in him.

It is not in how one soul approaches another but in how it withdraws that I knowr its affinity and solidarity with the other.

We believe that we know something about the things themselves when we speak of trees, colors, snow, and flowers; and yet we possess nothing but metaphors for things - metaphors which correspond in no way to the original entities.