We may truly say that those men are pursuing the true path of duty, who wish every day to consort on the most familiar terms with Zeno, Pythagoras, Democritus, and the rest of those high priests of virtue, with Aristotle and with Theophrastus. None of these men will be “engaged,” none of these will fail to send you away after visiting him in a happier frame of mind and on better terms with yourself, none of them will let you leave him empty-handed: yet their society may be enjoyed by all men, and by night as well as by day.