““Starting from Descartes’ commitment to a few absolutely certain innate ideas and reason’s ability to determine some facts about reality a priori, Leibniz ended up making all ideas innate and deducing how God must have set up the universe. On the other side, Hume continued Locke’s emptying out of the mind until there was no longer a there there, that is, not even a substantial mind to be emptied. Far from being rationally justifiable, Hume demonstrated that most of our beliefs are determined by an arational reflex, a process that has roughly the epistemological status of digestion. Perhaps Kant’s greatest accomplishment was reconciling these deeply heterogeneous schools, weaving a seamless system out of ideas taken from both sides. The linchpin of this synthesis was what he called his Copernican Revolution: the epoch-making claim that the mind actively processes or organizes experience in constructing knowledge, rather than passively reflecting an independent reality. To speak metaphorically, the mind is more like a factory than a mirror or soft wax. It is this idea that enabled Kant to incorporate the empiricist dependence on experience into the rationalist ideal of universal and necessary knowledge.””
