Mental sin is a sin made up in diseased mind which calls for marriage in secret form. The idea gets firmly twisted so the desire achieves sufficiency to be committed freely.
The sin starts in the soul of man not in the physical body. The body cannot do sin without permission from the soul, fornication between a man and woman who are not married to each other originates in man's soul. The sexual parts of the woman get laid in the conscious using the power of memory. The mind looses its sensible limits of thinking to draw correct conclusions because sex has no relaxation step. Thus fornication is sinning against the body without the spirit. Mental sin happens in all walks of life unstoppable because, it is a picture. Changing is achieved through focusing techniques to remove the subconscious obstacles that prevent achieving the end results.
The above picture brings the conclusion that the newly born spirit couldn't be perfect; no man can reach the perfection of Christ because the sin is permitted in our soul. Sin is a spiritual thing, we are not fully grown in Christ; we need to cleanse ourselves continuously from all filthiness of the soul and flesh then things start to get better. We are a new creature through Jesus but the sin nature in the flesh still there.
Sin allows man to be transformed into an earthly creature for earthly use. The clay of Adam was remade to face the sin. The mind lost its divine spirit make up, by letting soul to join in the mind. From construction into destruction of people, similar to an earthquake caused by a build-up of pressure which sends out a series of shock waves.
Jesus ceased His soul by refusing to sin to keep the fire burning. There is no demon actors attracting Jesus to sin. The focus of Jesus couldn’t stumble.
If the mind is not renewed with the Word of God, the flesh will be dominated by the soul. The power to act requires difficult decision. We are a spirit misled. It is up to us to put on the new man while the old body has the nature of the devil.
We must prepare something new for the converted life as in the sacrament of marriage. We do not find anything pleasant if we have never been fallen or stumbled. The good thing about marching with a new spirit is to stop the soul marching on to the grave.
As your spirit becomes new (when you are born again), it will know things your head doesn't know. Your spirit will try to tell you things the Word already tells you but you can't see. That's because your spirit picks up knowledge from the spirit of God. Your soul is then saved by your spirit.
You are now a remade man carried by the Word of God.
President Jimmy Carter said:
I have looked on a lot of woman with lust. I have committed adultery in my heart many times. This is something God recognizes I will do, and I have done it, and God forgives me for it.
Remember: A leadership must have the face of the Savior to cross the line for the message to be delivered in coordinated sense.