The question is, how far an opinion is life furthering, life preserving, species preserving, perhaps species rearing, and we are fundamentally inclined to maintain that the falsest opinions (to which the synthetic judgments a priori belong), are the most indispensable to us, that without a recognition of logical fictions, without a comparison of reality with the purely world of the absolute and immutable, without a constant counterfeiting of the world by means of numbers, man could not live that the renunciation of false opinions would be a renunciation of life, a negation of life.