"It is similar. Morgoth is, without a doubt, the most powerful of the Valar, yet Eru favors...others. I think he knew of his child's Darkness." but then one must ask: why let Morgoth continue existing?

Every Elf knows there is a balance to such things. Darkness must exist for Light to penetrate it.

"He has been known to twist and corrupt those Eru favors into images that are both monstrous and disturbing."