If you were to put a theme statement for the poem below what would it be?

Question

There's a certain Slant of light,
Winter Afternoons--
That opresses, like the Heft
Of Cathedral Tunes--

Heavenly Hurt, it gives us--
We can find no scar,
But internal difference,
Where the meanings are--

None may teach it--Any--
'Tis the Seal Despair--
An imperial affliction
Sent us of the Air--

When it comes, the Landscape listens--
Shadows--hold their breath--
When it goes, 'tis like the Distance
On the look of Death--

Answer 1

needing a nap in the aftenoon in winter.....I mean being so desperately tired that one can't hold one's eyes open.

Answer 2

depression is coming soon