Classic Poem

Some eyes are trained to scan large field
Till instantaneous glance may yield
A knowledge full and plenty;
While others keep a narrow ken
And view the ways of active men
With satisfaction scanty.

The optic nerve has power so keen,
That ev'ry object by it seen
Is stamped upon the brain;
But they of sluggish mental mold
No vivid photograph will hold,
And scarce a scene retain.