Shakespeare's Sonnet 88

When thou shalt be dispos’d to set me light,And place my merit in the eye of scorn,Upon thy side, against myself I’ll fight,And prove thee virtuous, though thou art forsworn.With mine own weakness, being best acquainted,Upon thy part I can set down a storyOf faults conceal’d, wherein I am attainted;That thou in losing me shalt win much glory:And I by this will be a gainer too;For bending all my loving thoughts on thee,The injuries that to myself I do,Doing thee vantage, double-vantage me.Such is my love, to thee I so belong,That for thy right, myself will bear all wrong.

When you feel inclined to dismiss me and expose my worth to contempt, I will fight on your side against myself and prove you good, even though you have broken your vows. Since I know my own weaknesses best, I can tell a story on your behalf of hidden faults I am guilty of, so that you will earn great honor by getting rid of me. And I will gain by this too. Since all my loving thoughts are directed toward you, the harm I do myself benefits you, and so benefits me twice over. My love is so strong, and I belong to you so completely, that to prove you right I will bear every wrong myself.