A. E. Housman: When I was one-and-twenty

When I was one-and-twenty  I heard a wise man say, "Give crowns and pounds and guineas  But not your heart away; Give pearls away and rubies  But keep your fancy free." But I was one-and-twenty,  No use to talk to me.
When I was one-and-twenty  I heard him say again, "The heart out of the bosom  Was never given in vain; 'Tis paid with sighs a plenty  And sold for endless rue." And I am two-and-twenty,  And oh, 'tis true, 'tis true.