Too little way the House must lie — Silkworm

Too little way the House must lie 1
From every Human Heart
That holds in undisputed Lease
A white inhabitant-

Too narrow is the Right between-5
Too imminent the chance-
Each Consciousness must emigrate
And lose its neighbor once-
(F.902/J.911)
[1] House:: a cocoon.
[2] Human Heart:: silk is what humans need from silkworms.
[3] Lease:: humans own the cocoons.
[4] A white inhabitant:: a silkworm.
[6] imminent the chance:: the chance for a worm to emerge as a moth.
[7] Each Consciousness must emigrate:: the metamorphosis.
[8] once:: this happens only once in its life. lose its neighbor:: the moth flies away.