The Republic by Plato Part 10 Page 77

a new life, must of necessity become different. But there was every other quality, and the all mingled with one another, and also with elements of wealth and poverty, and disease and health; and there were mean states also. And here, my dear Glaucon, is the supreme peril of our human state; and therefore the utmost care should be taken. Let each one of us leave every other kind of knowledge and seek and follow one thing only, if peradventure he may be able to learn and may find some one who will make him able to learn and discern between good and evil, and so to choose always and everywhere the better life as he has opportunity.

He should consider the bearing of all these things which have been mentioned severally and collectively upon virtue; he should know what the effect of beauty is when combined with poverty or