Asleep! O sleep a little while, white pearl!
And let me kneel, and let me pray to thee,
And let me call Heaven's blessing on thine eyes,
And let me breathe into the happy air,
That doth enfold and touch thee all about,
Vows of my slavery, my giving up,
My sudden adoration, my great love!
“slavery” and “my giving up” mean that he is trapped on Earth’s chains, because life on Earth is unbearable for him if she is not here, that is the reason why he gives up. 
