supposing that anyone were to learn philosophy and teach it to his father, could it be any longer disputed that the son had given him something greater than he had received from him, having returned to his father a happy life, whereas he had received from him merely life?

“But,” says our opponent, “whatever you do, whatever you are able to give to your father, is part of his benefit bestowed upon you.” So it is the benefit of my teacher that I have become proficient in liberal studies; yet we pass on from those who taught them to us, at any rate from those who taught us the alphabet; and although no one can learn anything without them, yet it does not follow that whatsoever success one subsequently obtains, one is still inferior to those teachers. There is a great difference between the beginning of a thing and its final development; the beginning is not equal to the thing at its greatest, merely upon the ground that, without the beginning, it could never have become so great.