The constant fluttering around the single flame of vanity is so much the rule and the law that almost nothing is as incomprehensible than how an honest and pure urge for truth could make an appearance among human beings.
They are deeply immersed in illusions and dream images. Their eye glides only over the surface of things and sees "forms". Nowhere does their feeling lead into truth, but contents itself with the reception of stimuli, playing, as it were, blindman's bluff on the backs of things.
"On Truth and Lie in an Extra-Moral Sense"
(a fragment published posthumously) 1873