One must never have spared oneself, one must have acquired hardness as a habit to be cheerful and in good spirits in the midst of nothing but hard truths.
One should not wrongly reify 'cause' and 'effect,' as the natural scientists do (and whoever, like them, now 'naturalizes' in his thinking), according to the prevailing mechanical doltishness which makes the cause press and push until it 'effects' its end; one should use 'cause' and 'effect' only as pure concepts, that is to say, as conventional fictions for the purpose of designation and communication-not for explanation.
The beautiful exists just as little as the true. In every case it is a question of the conditions of preservation of a certain type of man: thus the herd-man will experience the value feeling of the true in different things than will the overman.
Today as always, men fall into two groups: slaves and free men. Whoever does not have two-thirds of his day for himself, is a slave, whatever he may be: a statesman, a businessman, an official, or a scholar.
All religions bear traces of the fact that they arose during the intellectual immaturity of the human race - before it had learned the obligations to speak the truth. Not one of them makes it the duty of its god to be truthful and understandable in his communications.
Words are acoustical signs for concepts; concepts, however, are more or less definite image signs for often recurring and associated sensations, for groups of sensations. To understand one another, it is not enough that one use the same words; one also has to use the same words for the same species of inner experiences; in the end one has to have one's experiences in common.
When one speaks of humanity, the idea is fundamental that this is something which separates and distinguishes man from nature. In reality, however, there is no such separation: "natural" qualities and those called truly "human" are inseparably grown together. Man, in his highest and noblest capacities, is wholly nature and embodies its uncanny dual character. Those of his abilities which are terrifying and considered inhuman may even be the fertile soil out of which alone all humanity can grow in impulse, deed, and work.