How do I know to believe you? - Tell me some obscure factoid from Silmarillion... hehehehe
Let's see. Beren's father, Barahir, was betrayed to Morgoth by one of his men, who was miserable over the loss of his wife and thought she was a prisoner of the dark lord. The traitor was killed and his spirit warned Beren of the trap, allowing him to escape and meet Luthien.
That good enough?