Pharisaism is not a degeneration in a good man: a large portion of it is rather the condition of all being-good.

It was Christianity which first painted the devil on the worlds walls; It was Christianity which first brought sin into the world. Belief in the cure which it offered has now been shaken to it's deepest roots; but belief in the sickness which it taught and propagated continues to exists.

One receives as reward for much ennui, despondency, boredom -such as a solitude without friends, books, duties, passions must bring with it -those quarter-hours of profoundest contemplation within oneself and nature. He who completely entrenches himself against boredom also entrenches himself against himself: he will never get to drink the strongest refreshing draught from his own innermost fountain.

Madness is the result not of uncertainty but certainty.

The ascetic makes a necessity of virtue.

It is perhaps just dawning on five or six minds that physics, too, is only an interpretation and exegesis of the world (to suit us, if I may say so!) and not a world-explanation.

A strong and well-constituted man digests his experiences (deeds and misdeeds all included) just as he digests his meats, even when he has some tough morsels to swallow.