The Confessions Of Saint Augustine

So that when thought seeketh what the sense may conceive under this, and saith to itself, "It is no intellectual form, as life, or justice; because it is the matter of bodies; nor object of sense, because being invisible, and without form, there was in it no object of sight or sense"; -- while man's thought thus saith to itself, it may endeavour either to know it, by being ignorant of it; or to be ignorant, by knowing it.