I are to mean that we do not understand through pure rea son what the things that appear to us might be in themselves, then they are entirely improper and irrational; for they would have us be able to cognize things, thus intuit them, even without senses, consequently they would have it that we have a faculty of cognition entirely distinct from the human not merely in degree but even in intuition and kind, and thus that we ought to be not humans but beings that we cannot even say are possible, let alone how they are constituted.