"The delights of learning something good and excellent, and of studying some of the means whereby a man knows how to regulate his body well and manage his household successfully, to be useful to his friends and city and to defeat his enemies—knowledge that yields not only very great benefits but very great pleasures—these are the delights of the self-controlled; but the incontinent have no part in them. For who, should we say, has less concern with these than he who has no power of cultivating them because all his serious purposes are centered in the pleasures that lie nearest?"