For your teachers, they must be Nature and History: as for the first, that you must learn of it is so obvious that I need not dwell upon that now: hereafter, when I have to speak more of matters of detail, I may have to speak of the manner in which you must learn of Nature. As to the second, I do not think that any man but one of the highest genius, could do anything in these days without much study of ancient art, and even he would be much hindered if he lacked it. If you think that this contradicts what I said about the death of that ancient art, and the necessity I implied for an art that should be characteristic of the present day, I can only say that, in these times of plenteous knowledge and meagre performance, if we do not study the ancient work directly and learn to understand it, we shall find ourselves influenced by the feeble work all round us, and shall be copying the better work through the copyists and without understanding it, which will by no means bring about intelligent art.