Plato, Phaedrus

[232a] consider that lovers, believing that others would be as envious of them as they are of others, are likely to be excited by possession and in their pride to show everybody that they have not toiled in vain; but the non-lovers, since they have control of their feelings, are likely to choose what is really best, rather than to court the opinion of mankind. Moreover, many are sure to notice and see the lovers going about with their beloved ones and making that [232b] their chief business, and so, when they are seen talking with each other, people think they are met in connection with some love-matter either past or future; but no one ever thinks of finding fault with non-lovers because they meet, since everyone knows that one must converse with somebody, either because of friendship or because it is pleasant for some other reason. And then, too, if you are frightened by the thought that it is hard for friendship to last, and that under other circumstances any quarrel would be an equal misfortune to both, but that when you have surrendered [232c] what you prize most highly you would be the chief sufferer, it would be reasonable for you to be more afraid of the lovers; for they are pained by many things and they think everything that happens is done for the sake of hurting them. Therefore they prevent their loves from associating with other men, for they fear the wealthy, lest their money give them an advantage, and the educated, lest they prove superior in intellect; and they are on their guard [232d] against the influence of everyone who possesses any other good thing. If now they persuade you to incur the dislike of all these, they involve you in a dearth of friends, and if you consider your own interest and are more sensible than they, you will have to quarrel with them. But those who are not in love, but who have gained the satisfaction of their desires because of their merit, would not be jealous of those who associated with you, but would hate those who did not wish to do so, thinking that you are slighted by these last and benefited by the former, [232e] so that there is much more likelihood that they will gain friendship than enmity from their love-affair with you. And then, too, many lovers are moved by physical passion before they know the character or have become acquainted with the connections of the beloved, so that it is uncertain whether they will wish to be your friends