Plato, Phaedrus

[255a] Now the beloved, since he receives all service from his lover, as if he were a god, and since the lover is not feigning, but is really in love, and since the beloved himself is by nature friendly to him who serves him, although he may at some earlier time have been prejudiced by his schoolfellows or others, who said that it was a disgrace to yield to a lover, and may for that reason have repulsed his lover, yet, as time goes on, his youth [255b] and destiny cause him to admit him to his society. For it is the law of fate that evil can never be a friend to evil and that good must always be friend to good. And when the lover is thus admitted, and the privilege of conversation and intimacy has been granted him, his good will, as it shows itself in close intimacy, astonishes the beloved, who discovers that the friendship of all his other friends and relatives is as nothing when compared with that of his inspired lover. And as this intimacy continues and the lover comes near and touches the beloved in the gymnasia and in their general intercourse, [255c] then the fountain of that stream which Zeus, when he was in love with Ganymede, called “desire” flows copiously upon the lover; and some of it flows into him, and some, when he is filled, overflows outside; and just as the wind or an echo rebounds from smooth, hard surfaces and returns whence it came, so the stream of beauty passes back into the beautiful one through the eyes, the natural inlet to the soul, where [255d] it reanimates the passages of the feathers, waters them and makes the feathers begin to grow, filling the soul of the loved one with love. So he is in love, but he knows not with whom; he does not understand his own condition and cannot explain it; like one who has caught a disease of the eyes from another, he can give no reason for it; he sees himself in his lover as in a mirror, but is not conscious of the fact. And in the lover's presence, like him he ceases from his pain, and in his absence, like him he is filled with yearning such as he inspires, and love's image, requited love, dwells within him; [255e] but he calls it, and believes it to be, not love, but friendship. Like the lover, though less strongly, he desires to see his friend, to touch him, kiss him, and lie down by him; and naturally these things are soon brought about. Now as they lie together, the unruly horse of the lover has something to say to the charioteer, and demands a little enjoyment in return for his many troubles;