Still we do not yet know whence the impulse to truth comes, for up to now we have heard only about the obligation which society imposes in order to exist: to be truthful, that is, to use the usual metaphors, therefore expressed morally: we have heard only about the obligation to lie according to a fixed convention, to lie gregariously in a style binding for all. Now man of course forgets that matters are going thus with him; he therefore lies in that fashion pointed out unconsciously and according to habits of centuries' standing--and by _this very unconsciousness,_ by this very forgetting, he arrives at a sense for truth. Through this feeling of being obliged to designate one thing as "red," another as "cold," a third one as "dumb," awakes a moral emotion relating to truth. Out of the antithesis "liar" whom nobody trusts, whom all exclude, man demonstrates to himself the venerableness, reliability, usefulness of truth. Now as a "_rational_" being he submits his actions to the sway of abstractions; he no longer suffers himself to be carried away by sudden impressions, by sensations, he first generalises all these impressions into paler, cooler ideas, in order to attach to them the ship of his life and actions. Everything which makes man stand out in bold relief against the animal depends on this faculty of volatilising the concrete metaphors into a schema, and therefore resolving a perception into an idea. For within the range of those schemata a something becomes possible that never could succeed under the first perceptual impressions: to build up a pyramidal order with castes and grades, to create a new world of laws, privileges, sub-orders, delimitations, which now stands opposite the other perceptual world of first impressions and assumes the appearance of being the more fixed, general, known, human of the two and therefore the regulating and imperative one. Whereas every metaphor of perception is individual and without its equal and therefore knows how to escape all attempts to classify it, the great "edifice of ideas shows the rigid regularity of a Roman Columbarium and in logic breathes forth the sternness and coolness which we find in mathematics. He who has been breathed upon by this coolness will scarcely believe, that the idea too, bony and hexa-hedral, and permutable as a die, remains however only as the _residuum of a metaphor,_ and that the illusion of the artistic metamorphosis of a nerve-stimulus into percepts is, if not the mother, then the grand-mother of every idea. Now in this game of dice, "Truth" means to use every die as it is designated, to count its points carefully, to form exact classifications, and never lo violate the order of castes and the sequences of rank. Just as the Romans and Etruscans for their benefit cut up the sky by means of strong mathematical lines and banned a god as it were into a _templum,_ into a space limited in this fashion, so every nation has above its head such