It was suggested in a scene (the one where Eli attacks his dad) that Eli abused his father when he didn't comply with "the Lord's will" and so he encouraged him to do the same with his daughters.
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Here's my humble opinion on Paul/Eli. And yeah, I agree, schizophrenia wouldn't fit even if Paul/Eli
were the same person. Schizophrenia usually does cause paranoia and distortion of reality, but thinking/acting like 2 different people would probably be an entirely different diagnosis. I just think people use "schizophrenia" for all kinds of things even when it's not the best term for the situation.
Here's my take on Paul/Eli Sunday, wether they are 2 or the same people.
In
Peter Pan productions, Mr. Darling and Captain Hook are usually portrayed by the same actor. This is meaningful, not originally, but as the trend continued, some read some subtext behind it. Hook is usually the villain, Mr. Darling is Wendy's father, not perfect, but deep down very loving. The dichotomy of the characters meaning in Wendy's life is interesting. They're both males that control her destiny in different ways.
In TWBB, Paul is apparently straight, looking for money, and obviously strong enough to go and make this kind of offer to a total stranger. Eli is an overzealous pompous figure that must have some kind of control and even glory from those around him.
Daniel has both of these characteristics, but his madness and lust for power consumed all. Daniel held his appetite knowing he needed to stay cool to keep his business attractive. He even accepts the offer to attend Eli's service, "confess" and accept redemption. While he never was a good man, apparently, he was a dreamer with intiative just like Paul appeared to be. However, Paul was never seen again, just like Daniel's less brutal qualities.
Now, I'm not saying this WAS what the movie intended, but it's what I took from it. Then I thought about it and sort of came to the conclusion that Paul wasn't just some trick solely to keep the audience guessing, but that in any good movie, there's deeper meaning to seemingly random occurences. But that's just my take.
