Forse perchè d' altrui.

Perchance that I might learn what pity is,
That I might laugh at erring men no more,
Secure in my own strength as heretofore,
My soul hath fallen from her state of bliss:
Nor know I under any flag but this
How fighting I may 'scape those perils sore,
Or how survive the rout and horrid roar
Of adverse hosts, if I Thy succour miss.
O flesh! O blood! O cross! O pain extreme!
By you may those foul sins be purified,
Wherein my fathers were, and I was born!
Lo, Thou alone art good: let Thy supreme
Pity my state of evil cleanse and hide-
So near to death, so far from God, forlorn.

Michelangelo Buonarroti

http://www.poemhunter.com/poem/lxxi-a-prayer-for-purification/