"All, save I, were at rest or in enjoyment: I, like the arch fiend, bore a hell within me"

   Reference to Book IV of Milton's Paradise Lost (See note to page 103) in which an envious Satan, like the creature in this passage, declares war on all mankind, driven by his own envious torment:

 

The hell within him; for within him hell

He brings, and round about him, nor from hell

One step, no more than from himself, can fly

By change of place...