when they don't know about them, and, not having come to an understanding at first because they think that they know, they end, as might be expected, in contradicting one another and themselves. Now you and I must not be guilty of this fundamental error which we condemn in others; but as our question is whether the lover or non-lover is to be preferred, let us first of all agree in defining the nature and power of love, and then, keeping our eyes upon the definition and to this appealing, let us further enquire whether love brings advantage or disadvantage.
'Every one sees that love is a desire, and we know also that non-lovers desire the beautiful and good. Now in what way is the lover to be distinguished from the non-lover? Let us note that in every one of us there are two guiding and ruling principles which lead us whither they will; one is the natural desire of pleasure, the other is an acquired opinion which aspires after the best; and these two are sometimes in harmony and then again at war, and sometimes the one, sometimes the other conquers. When opinion by the help of reason leads us to the best, the conquering principle is called temperance; but when desire, which is devoid of reason, rules in us and drags us to pleasure, that power of misrule is called excess. Now excess has many names, and many members, and many forms, and any of these forms when very marked gives a name, neither honourable nor creditable, to the bearer of the name. The desire of eating, for example, which gets the better of the higher reason and the other desires, is called gluttony, and he who is possessed by it is called a glutton; the tyrannical desire of drink, which inclines the possessor of the desire to drink, has a name which