It is quite interesting to see that sometimes mistyping can lead to unexpected discoveries in the language syntax...

Mind

Richard Wilbur

Mind in its purest play is like some bat
That beats about in caverns all alone,
Contriving by a kind of senseless wit
Not to conclude against a wall of stone.

It has no need to falter or explore;
Darkly it knows what obstacles are there,
And so may wave and flitter, dip and soar
In perfect courses through the blackest air.

And has this simile a like perfection?
The mind is like a bat. Precisely. Save
That in the very happiest intellection
A graceful error may correct the cave.