there's a certain slant...

There's a certain slant of light,
On winter afternoons,
That oppresses, like the weight
Of cathedral tunes.

Heavenly hurt it gives us;
We can find no scar,
But internal difference
Where the meanings are.

None may teach it anything,
'Tis the seal, despair,-
An imperial affliction
Sent us of the air.

-Emily Dickinson