1) We are often deceived by our own biases and flawed perceptions of reality. We deny truths we don't want to face and are rarely objective.
2) The Bible warns that the human heart is deceitful and that we can deceive ourselves into thinking we are good or righteous through our own works instead of faith in Jesus Christ.
3) Specific ways the document outlines we can deceive ourselves include thinking we are not accountable for our actions, that we are good enough on our own, or that we can save ourselves through works instead of grace. True salvation comes only through faith in Christ.