“Altered opinions do not alter a man’s character (or do so very little); but they do illuminate individual aspects of the constellation of his personality which with a different constellation of opinions had hitherto remained dark and unrecognizable.”

“I can tell by my own reaction to it that this book is harmful." But let him only wait and perhaps one day he will admit to himself that this same book has done him a great service by bringing out the hidden sickness of his heart and making it visible.— Altered opinions do not alter a man’s character (or do so very little); but they do illuminate individual aspects of the constellation of his personality which with a different constellation of opinions had hitherto remained dark and unrecognizable.”

“One sticks to an opinion because he prides himself on having come to it on his own, and another because he has taken great pains to learn it and is proud to have grasped it: and so both do so out of vanity.”

“In conversation we are sometimes confused by the tone of our own voice, and mislead to make assertions that do not at all correspond to our opinions.”

“4. The falseness of an opinion is not for us any objection to it: it is here, perhaps, that our new language sounds most strangely. The question is, how far an opinion is life-furthering, life- preserving, species-preserving, perhaps species-rearing, and we are fundamentally inclined to maintain that the falsest opinions (to which the synthetic judgments a priori belong), are the most indispensable to us, that without a recognition of logical fictions, without a comparison of reality with the purely IMAGINED world of the absolute and immutable, without a constant counterfeiting of the world by means of numbers, man could not live—that the renunciation of false opinions would be a renunciation of life, a negation of life. TO RECOGNISE UNTRUTH AS A CONDITION OF LIFE; that is certainly to impugn the traditional ideas of value in a dangerous manner, and a philosophy which ventures to do so, has thereby alone placed itself beyond good and evil.”

“Facta! Yes, Facta ficta! - A historian has to do, not with what actually happened, but only with events supposed to have happened: for only the latter have produced an effect. Likewise only with supposed heroes. His theme, so-called world history, is opinions about supposed actions and their supposed motives, which in turn give rise to further opinions and actions, the reality of which is however at once vaporised again and produces an effect only as vapour - a continual generation and pregnancy of phantoms over the impentetrable mist of unfathomable reality. All historians speak of things which have never existed except in imagination.”

“It is not conflict of opinions that has made history so violent but conflict of belief in opinions, that is to say conflict of convictions.”