This article aims to explore the notion and the dynamics of self-deception as a part of what we understand as the noetic effects of sin. Firstly, we start with a theological analysis of the consciousness because of the supratemporal nature of the human heart. Secondly, through this analysis, we can see the roots of self-deception in the presupposition that the ego is transparent to itself. Thirdly, one element of the dynamic of self-deception is the cognitive parallax that shows the distance between theory and reality. Fourthly, self-deception can be formalized in theoretical systems and create a legitimizing discourse to support given positions. Finally, we try to redeem self-deception through the revelation that enlightens the human mind.