Half close your eyelids, loosen your hair,
And dream about the great and their pride;
They have spoken against you everywhere,
But weigh this song with the great and their pride;
I made it out of a mouthful of air,
Their children's children shall say they have lied.

William Butler Yeats

http://www.poemhunter.com/poem/he-thinks-of-those-who-have-spoken-ill-of-his-be/