We must reject the conception of education professed by those who say that they can put into the mind knowledge that was not there before – rather as if they could put sight into blind eyes […] But our argument indicates that the capacity for knowledge is innate in each man’s mind, and that the organ by which he learns is like an eye which cannot be turned from darkness to light unless the whole body is turned; in the same way the mind as a whole must be turned away from the world of change until its eye can bear to look straight at reality, and at the brightest of all realities which is what we call the Good. (Republic)