Once a person has Accepted the Lord Jesus and Received a New Life, a Marvelous Thing Happens to him, which is, that a Principle of Life is Added to him.
Yet through ignorance, he may set aside This Life Principle and follow the right and wrong principle instead.
But the principle of right and wrong, good and evil, is NOT Christianity.
The Word of God Declares: from the Tree of the Knowledge of Good and Evil, you do not eat from it, for in the day of your eating from it—dying you die.