My thoughts on the descent of our moral prejudices – for that is what this polemic is about – were first set out in a sketchy and provisional way in the collection of aphorisms entitled Human, All Too Human. A Book for Free Spirits, which I began to write in Sorrento during a winter that enabled me to pause, like a wanderer pauses, to take in the vast and dangerous land through which my mind had hitherto travelled. This was in the winter of 1876–7; the thoughts themselves go back further. They were mainly the same thoughts which I shall be taking up again in the present essays – let us hope that the long interval has done them good, that they have become riper, brighter, stronger and more perfect! The fact that I still stick to them today, and that they themselves in the meantime have stuck together increasingly firmly, even growing into one another and growing into one, makes me all the more blithely confident that from the first, they did not arise in me individually, randomly or sporadically but as stemming from a single root, from a fundamental will to knowledge deep inside me which took control, speaking more and more clearly and making ever clearer demands. And this is the only thing proper for a philosopher. We have no right to stand out individually: we must not either make mistakes or hit on the truth individually. Instead, our thoughts, values, every ‘yes’, ‘no’, ‘if ’ and ‘but’ grow from us with the same inevitability as fruits borne on the tree – all related and referring to one another and a testimonial to one will, one health, one earth, one sun. – Do you like the taste of our fruit? – But of what concern is that to the trees? And of what concern is it to us philosophers? . . .
Friedrich Nietzsche, On the Genealogy of Morals
morality, optimism