Pro 23:7 For as he thinks within himself, so he is. He says to you, “Eat and drink!” But his heart is not with you.
Thoughts are rather easy to conceal. To some extent, that is a good thing. You would not want to know everything that goes on in my head, nor I yours. But the discrepancy between the inner thoughts of a wicked person and his outward persona is a favorite tool of evil.
2Co 11:14 And no wonder, for even Satan disguises himself as an angel of light.
As a person thinks…that is who the person really is. What goes on in the mind of the person who wears an “eminent, holy, Christian” mask? What is he or she thinking? The remarkable thing is that such a person probably doesn’t fully know their own thoughts! I doubt that Mr. Domestic Abuser walks into church on Sunday actively thinking, “I will act and speak in such and such a manner in order to dupe these people and hide who I really am.” Nevertheless, his thought machine is still operating. He knows that his holy front will bring him rewards.
I suspect that this “thinking” I am speaking of is a kind of automatic, sub-conscious thing. As the Proverb says, it is who he is. His thoughts are always about himself. How he can be praised. How he can benefit. How he can put others down. How he will get revenge. His sin is a program that constantly runs in his mind and it is always about self, self, self.
Certainly we all are born into this world as sinners and our minds at that time were pre-programed to think in such a way that our words and actions always sought to benefit, ME. When Christ grabbed hold of us, showed us our sin and terrified us with the demands of His Law, He put us to death with Him on the cross. He erased, you might say, that original program of sin and made us new creations. While we still battle the sin that strives to reclaim us, the fact is that our new minds have new thoughts. As a Christian thinks in his heart, so is he. Self is no longer on the throne. Christ is. We love others rather than use and abuse them. And when we sin, we are cut to the core and we repent.
Not so the evil man. Confront him with his hypocrisy. Show him his sin. Expose his wicked thoughts. What will be the result? Gnashing of teeth. Murderous hatred. It is who he is. A child of the evil one.