Not only are these things, considered in these general terms, clearly known and grasped by me: I also, if I pay close attention, perceive innumerable particular facts involving shape, number, motion, and suchlike facts so plainly true, and so much in conformity with my nature, that when I first discover them I do not seem to be learning anything new, but rather to be remembering something I knew before, or to be noticing for the first time something that was in me already, although I had not previously turned the gaze of my mind in its direction.