Like him who great reports of tilth rejects,
Because his own is a most barren field,
Is he who man’s divinity suspects,
Because his own soul doth so little yield.
Better is one who through himself can see
How good, how lovely, all mankind might be,
Though mere experience give his faith the lie,
And all his hopes breathe the world’s breath—to die!

Charles Harpur

http://www.poemhunter.com/poem/like-him-who-great-reports-of-tilth-rejects/