Was Melkor Bipolar?

[Nerwen]

Originally Posted by Morthoron

I wonder if one can even state a divinity or angelic being (albeit, a fictional deity) can exhibit any form of mental illness or ailments whatsoever. Being immortal, it would seem that such a being would not suffer from diminished mental capacity or the thousand natural shocks which flesh is heir to.

All the same, I do quite like the idea of Morgoth trying to plead insanity after the War of Wrath.