Looking For Quotes About Morgoth

[Pitchwife]

The quote your friend was thinking about, Nikkolas, may be this from HoME X, Morgoth's Ring:

Originally Posted by Melkor Morgoth in the Myths Transformed section

But Melkor had already progressed some way towards becoming 'the Morgoth, a tyrant (or central tyranny and will), + his agents'. Only the total contained the old power of the complete Melkor; so that if 'the Morgoth' could be reached or temporarily separated from his agents he was much more nearly controllable and on a power-level with the Valar.

The quote about Manwë and Melkor that Beregorn gave is a few lines down in the same text. There is also in Myths Transformed a lot of Tolkien debating with himself to and fro whether Orcs were corrupted Elves or Men, or semi-intelligent beasts, or lower-ranking Ainur incarnate, or what not.