Friedrich Nietzsche

The Will to Power

Book III: Principle of a New Determination of Values/Part 1. The Will to Power as Knowledge

473 The intellect cannot criticize itself, precisely because it cannot be compared with different kinds of intellects, and because its ability to acquire knowledge would be manifested only in the face of ‘true reality’; i.e. in order to criticize the intellect, we should have to be superior beings who possessed ‘absolute knowledge’. This already presupposes that, apart from all perspectival kinds of observation and sensory and intellectual appropriation, there is something, an ‘in-itself’ – but the psychological derivation of the belief in things forbids our speaking of ‘things in themselves’.