For from within, out of the heart of man, come evil thoughts, sexual immorality, theft, murder, adultery, coveting, wickedness, deceit, sensuality, envy, slander, pride, foolishness. All these evil things come from within, and they defile a person.”
(Mark 7:21-23) Pride is indeed a sin and as the passage says, it “defiles a person.” Pride makes you unclean and impure. The sin of pride must be handled consciously. If you don’t take it seriously, you won’t even recognize your prideful attitude. It will infect many of the decisions you make.