What the Bible Says about the Dangers of Self-Deception

How do people know if they are deceiving themselves? Self-deception is something everyone practices to one degree or another, and it is closely related to other-deception (deceiving other people) and Satan''s deception as the father of lies (John 8:44). How dangerous is self-deception? It can cost people their eternal destiny if they are deceiving themselves about their salvation. Self-deception h...