Mathematics would certainly have not come into existence if one had known from the beginning that there was in nature no exactly straight line, no actual circle, no absolute magnitude.
Friedrich NietzscheWhat saved me then? Nothing but pregnancy. And each time after I had given birth to my work my life hung suspended by a thin thread.
Friedrich NietzscheWe have no organ at all for knowledge, for truth: we know (or believe or imagine) precisely as much as may be useful in the interest of the human herd, the species: and even what is here called usefulness is in the end only a belief, something imagined and perhaps precisely that most fatal piece of stupidity by which we shall one day perish.
Friedrich Nietzsche