No More Learning

There are, then, certain bodies, possessed of power
To vary forever the empty and the full;
And these can nor be           from without
By beats and blows, nor from within be torn
By penetration, nor be overthrown
By any assault soever through the world--
For without void, naught can be crushed, it seems,
Nor broken, nor severed by a cut in twain,
Nor can it take the damp, or seeping cold
Or piercing fire, those old destroyers three;
But the more void within a thing, the more
Entirely it totters at their sure assault.