" Here we should quote especially those sections from Nietzsche's central morality-critical work The Genealogy of Morals that deal with their subject in a diction of Olympian clarity. In the decisive passage he discusses the practice forms of that life-denial or world-weariness which, according to Nietzsche, exemplifies the morphological circle of sick asceticisms in general:

'The ascetic [of the priestly-sick type] treats life as a wrong path on which one must walk backwards till one comes to the place where it starts; or he treats it as an error which one may, nay must, refute by action: for he demands that he should be followed; he enforces, where he can, his valuation of existence. What does this mean? Such a monstrous valuation is not an exceptional care, or a curiosity recorded in human history: it is one of the broadest and longest facts that exist. Reading from the vantage point of a distant star the capital letters of our earthly life would perchance lead to the conclusion that the earth was the truly ascetic planet, a den of discontented, arrogant and repulsive creature creatures, who never got rid of a deep disgust of themselves, of the
world, of all life, and did themselves as much hurt as possible out of pleasure in hurting - presumably their one and only pleasure. "

― Peter Sloterdijk , You Must Change Your Life