"It wouldn't really be a victory for the people of this world - at least, some of them who I know - to be restored to life but knowing now that there are other worlds still suffering, other worlds with the griefs ours has now overcome, and nothing we can do about it. And my family isn't really going to be popular here. Perhaps you could suggest to Eru that part of a happy ending for this world involves putting all its malcontents on other ones where they can redeem themselves." We don't actually need Eru for cosmic power, we just need a few uninterrupted Ages.