The Fact that Earth is Heaven — Earth-House

The Fact that Earth is Heaven-1
Whether Heaven is Heaven or not
If not an Affidavit
Of that specific Spot
Not only must confirm us 5
That it is not for us
But that it would affront us
To dwell in such a place-
(F.1435/J.1408)
[1] Earth:: earth-house, a grave.
[2] Heaven is Heaven:: God's heaven is paradise.
[3] Affidavit:: a statement made in writing, confirmed by the maker's oath, and intended to be used as judicial proof (OED).
[4] specific Spot:: a small space for some special purpose approved by law.
[5, 6] confirm, not for us:: the earth-house is not built for the living.
[7] affront:: to insult.
[8] dwell in such a place:: probably from Longfellow's The Grave, "Loathsome is that earth-house, And grim within to dwell."