No Married Persons

[Inziladun]

Originally Posted by Galadriel55

There is power and power. Sure, she was inside his stronghold, and seemingly helpless. That's one type of power. But Morgoth has a desire to posess her - not only to have control over her, but more like Ungoliant wanted to devour all Light, and Morgoth wanted to posess the Silmarili. Knowing that you have control is not always enough "power" in this sense.

The incident as described in The Silmarillion though would seem to lead away from "possession" as Morgoth's motive.

Then Morgoth looking upon her beauty conceived in his thought an evil lust, and a design more dark than any that had yet come into his heart since he fled from Valinor.

That seems entirely of a sexual nature. The desire to possess was obviously not a new one to Morgoth, and if that had been chiefly in his thought, I don't see why his feelings about Lúthien would have been of such note.