The stars are not wanted now: put out every one, Pack up the moon and dismantle the sun,Pour away the ocean and sweep up the wood;For nothing now can ever come to any good. (13-16)
The speaker's grief is so intense that he doesn't want any reminders of beauty in the world. He doesn't want to see the stars, the moon, the sun, the ocean, or the forests. That's asking a lot, to be sure, but we can understand where he's coming from. Clearly he's in the Depression Stage of grief. But hey, the next step is acceptance, so maybe there is a bit of hope.