No More Learning

no           of earth thou art--
An unseen seraph, we believe in thee,--
A faith whose martyrs are the broken heart,
But never yet hath seen, nor e'er shall see,
The naked eye, thy form, as it should be;
The mind hath made thee, as it peopled heaven,
Even with its own desiring phantasy,
And to a thought such shape and image given,
As haunts the unquenched soul--parched--wearied--wrung--and riven.