1 First there is Socrates,17 who, in urging us to be on our guard against such things to eat as persuade us to eat when we are not hungry, and such things to drink as persuade us to drink when we are not thirsty, did not absolutely forbid the use of these things; Ebut he was instructing us to use them only if we needed them, and to make the pleasure in them serve our necessity, just as our statesm