Though Morgoth is physically banished from the world, the evil he created there lives on without him. In the Music of the Ainur, he corrupted the world, and while present there he corrupted its people. The tradition of the elves says that the world will be healed during the second Music of the Ainur, but not even the Valar have seen that far into the future—or, if they have, they haven’t told the elves. The elves persist in their beliefs not because of proof, but because of faith.