In this precise sense, Kant was "the inventor of the philosophical history of philosophy": there are necessary stages in the development of philosophy, that is, one cannot directly get at the truth, one cannot begin wit it, philosophy necessarily began with metaphysical illusions. The path from illusion to its critical denunciation is the very core of philosophy, which means that successful ("true") philosophy is no longer defined by its truthful explanation of the totality of being, but by successfully accounting for the illusions, that is, by explaining not only why illusions are illusions, but also why they are structurally necessary, unavoidable, and not just accidents.