Chaucer

For there is one thing I can safely say: that those bound by love must obey each other if they are to keep company long. Love will not be constrained by mastery; when mastery comes, the God of love at once beats his wings, and farewell -- he is gone. Love is a thing as free as any spirit; women naturally desire liberty, and not to be constrained like slaves; and so do men, if I shall tell the truth.

See who is the most patient in love; he has the greatest advantage. Patience is surely a great virtue, for it vanquished, as these scholars say, things that rigor would never manage. One cannot scold or complain at every word. Learn to endure patiently, or else, as I live and breathe, you shall learn it whether you want or not. For certainly there is no one in the world who doesn't do or say something amiss. Anger, sickness, or planetary influences, wine, sorrow, or changing of disposition often causes one to do or speak amiss. One cannot be avenged for every wrong; according to the occasion, everyone who knows how, must use temperance. And therefore a wise man, in order to live in comfort, promises his lady forbearance, and she wisely gives her promise to him.

from "The Franklin's Tale"