Love by sure proof I may call thee unkind,
That giv'st no better ear to my just cries:
Thou whom to me such my good turns should bind,
As I may well recount, but none can prize:

For when, nak'd boy, thou couldst no harbor find
In this old world, grown now so too too wise,
I lodg'd thee in my heart, and being blind
Bu nature born, I gave to thee mine eyes.

Mine eyes, my light, my heart, my life alas,
If so great services may scorned be,
Yet let this thought thy tigrish courage pass:

That I perhaps am somewhat kin to thee,
Since in thine arms, if learn'd fame truth hath spread,
Thou bear'st the arrow, I the arrowhead.

Sir Philip Sidney

http://www.poemhunter.com/poem/sonnet-65-love-by-sure-proof/