Chrétien de Troyes,
Yvain, the Knight of the Lion…
“ The lady, all unaware, has well avenged her lord's death. She has secured greater revenge than she could ever have done unless she had been aided by Love, who attacks him so gently that he wounds his heart through his eyes. And this wound is more enduring than any inflicted by lance or sword. A sword-blow is cured and healed at once as soon as a doctor attends to it, but the wound of love is worst when it is nearest to its physician. This is the wound of my lord Yvain, from which he will never more recover, for Love has installed himself with him. ”
