Delusion, Self
Self-delusion is the inner deception by which a person mistakes a wrong way for a right one — judging their own conduct pure, their position secure, and divine judgment far off when none of those things hold. Scripture treats it as a moral failure with fatal consequences, exemplified in the obstinate sinner, the prosperous fool, and the church that boasts wealth while being wretched and poor.
Click here to read the full topic on this subject: Self delusion