William Butler Yeats
A Man Young And Old: I
Though nurtured like the sailing moon in beauty's murderous brood, she walked awhile and blushed awhile and on my pathway stood until I thought her body bore a heart of flesh and blood. But since I laid a hand thereon and found a heart of stone I have attempted many things and not a thing is done, for every hand is lunatic that travels on the moon. She smiled and that transfigured me and left me but a lout, maundering here, and maundering there, emptier of thought than the heavenly circuit of its stars when the moon sails out.