Have you ever known anyone who actually came to realize and understand that he'd been affected mentally by using drugs?

Dealing with someone who has what I (as a layperson) would call paranoid delusions—knowing he is a heavy drug user and has been for a long time—can someone like him ever get to the place where he sees that he was wrong, those things never actually happened?

Does anyone who’s there ever regain that much rationality?

Or is he always going to be rigidly and belligerently certain that his cockeyed view of things is the one and only right one, and anyone who sees them differently is against him?

I’m pretty much through with trying to argue and reason, but I am damned worn down just from being harangued by these many weird beliefs and absolute certainties. Especially when I come in for accusation and blame on account of them. Would be grateful for some hope if there is any.

Thank you.