Strictly speaking, it is the mind that is deceived. If sin attempts to enter the soul by the affections, the mind should be able to put a stop to it. But where the mind, the leading faculty of the soul, is infected, sin is sure to prevail. The mind ought always to guide, direct, choose, and lead; hence deception in the mind is most dangerous. It the light that is in us is darkness, how great is that darkness!