Repentance is not fun for an Adamic sinner, but it is integral to saving faith. For some folks, it proves to be impossibly difficult. You need to understand that about non-Christians. I certainly do. As RobRoy has intimated in another post, self-destructive behavior really is self-destructive.
And I am not even talking about turning over a new leaf to do good works. I am talking about the Satanic depravity of the unregenerate sinner. He hates God. He hates the Truth. He just doesn't ordinarily admit this to himself--i.e., he won't repent.
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Let me also urge you to read my #696.