No More Learning

For, in the outset, eyes they had and saw not;
And ears they had but heard not; age on age,
Like unsubstantial shapes in vision seen,
They groped at random in the world of sense,
Nor knew to link their building, brick with brick,
Nor how to turn its aspect to the sun,
Nor how to join the beams by carpentry,
In hollowed caves they dwelt, as emmets dwell,
Weak           for each blast, in sunless caves.