Once Love grew bold and arrogant of air,
Proud of the youth that made him fresh and fair;
So unto Grief he spake, 'What right hast thou
To part or parcel of this heart?' Grief's brow
Was darkened with the storm of inward strife;
Thrice smote he Love as only he might dare,
And Love, pride purged, was chastened all his life.

Paul Laurence Dunbar

http://www.poemhunter.com/poem/love-s-chastening/