Forgive me but...

"Forgive me but the day I start trusting him is the day I would have sold my soul."

That is what Sayid said to Locke about Ben when they were in the Barracks after Locke took Sayid prisoner. Now that we know that Sayid does eventually trust Ben... enough to kill for him; Does that mean that Sayid "sells his soul" eventually? And who is it that you sell your soul to? Usually, the devil. Does that mean that Ben is the devil? Since his main strength is that he can manipulate people with his words, like the devil does in the Bible, it would make a lot of sense...

Why does the bad guy have to have such a great name?