Dan

“For us, the falsity of a judgment is still no objection to that judgment — that’s where our new way of speaking sounds perhaps most strange. The question is the extent to which it makes demands on life, sustains life, maintains the species, perhaps even creates species. And as a matter of principle we are ready to assert that the falsest judgments (to which a priori synthetic judgments belong) are the most indispensable to us, that without our allowing logical fictions to count, without a way of measuring reality against the purely invented world of the unconditional and self-identical, without a constant falsification of the world through numbers, human beings could not live — that if we managed to give up false judgments, it would amount to a renunciation of life, a denial of life.

To concede the fictional nature of the conditions of life means, of course, taking a dangerous stand against the customary feelings about value. A philosophy which dares to do that is for this reason alone already standing beyond good and evil.”
― Nietzsche, Além do Bem e do Mal