Air has no Residence, no Neighbor — Air Castle

Air has no Residence, no Neighbor, 1
No Ear, no Door,
No Apprehension of Another
Oh, Happy Air!

Ethereal Guest at e'en an Outcast's Pillow-5
Essential Host, in Life's faint, wailing Inn,
Later than Light thy Consciousness accost me
Till it depart, persuading Mine-
(F.989/J.1060)
[1] Air:: air castle, a castle-in-the-air.
[3] No Apprehension:: no one knows the fantasy.
[4] Happy Air:: a happy mood.
[5] Etherial Guest:: visionary guest who comes to the fantasy land.
[6] Essential Host:: the one who dreams and makes the air-castle.
[8] it:: an air castle, a dream.

The imagination is buoyant, ethereal, and elevates poor mortals up to the stars sometimes. It was so with Bobby. He was building up some kind of an air castle, and had got up in the clouds amidst the fog and moonshine, and that aggravating voice brought him down, slap, upon terra firma. ─ The Adventures of Bobby Bright (1857)