Let's Talk Morgoth

[Maédhros]

You can't - that's the point. If you could know definitely one way or the other it would have a too deterministic effect on your freedom of belief.

But the point is that we cannot say that every action that turned out for the good of ME was a direct intervention of Eru. Gollum fell and that an intervention of Eru. Frodo had pity for Gollum and that was an intervention of Eru.

No, it wasn't his right to act as he saw fit - certainly he had the ability to do as he saw fit, but being able to do something is not the same thing as having the right to do it.

It is interesting but as I see it, the more Melkor acted as he saw fit, the more he wanted to make Arda his (in a way) in the End, he was making a greater Arda for Ilúvatar. So in the moment of his actions were not "good" but in the end, it turned out to be the best.