Lay your sleeping head, my love,Human on my faithless arm; (1-2)
This is a really intimate way to begin a poem. It's almost as if we're overhearing the speaker whispering to his lover in bed.
Mortal, guilty but to meThe entirely beautiful. (9-10)
The speaker knows that his beloved isn't perfect. Instead of being a
problem, his mortality and guiltiness is what makes him worth loving.
It's what makes him beautiful to the speaker.
Soul and body have no bounds: (11)
It seems here like the lovers are all tangled up in each other, both physically and emotionally.