Chrétien de Troyes,
Yvain, the Knight of the Lion…
“ For if Love had recognised these two men, he must have forbidden each to attack the other, or to do any thing to cause him harm. In this respect, then, Love is blind and discomfited and beguiled; for, though he sees them, he fails to recognise those who rightly belong to him. And though Hate is unable to tell why one of them should hate the other, yet she tries to engage them wrongfully, so that each hates the other mortally. You know, of course, that he cannot be said to love a man who would wish to harm him and see him dead. How then? Does Yvain wish to kill his friend, my lord Gawain? ”
