For as he thinks in his heart, so is he. Proverbs 23:7 (NKJV)
Christians, persons who have received the Spirit of God at salvation, have entered God’s kingdom. They are new spiritual creatures (2 Corinthians 5:17), but they retain the memory banks of previous years. Habits, thoughts, inclinations, and affections can still influence behavior as before.
That is exactly why too many Christians live in such a miserable state. They do not want to return to their former state, but on the other hand, they cannot enjoy their new standing as children of God.
Yet there is hope. Your internal being—mind, emotions, will—can come under the influence of the Holy Spirit, who now indwells you. Your old mental grid system can be replaced by an entirely new set of thoughts and behavior through the power of God’s truth.
A new way of living is possible when you view life from God’s perspective and His truth takes up residence in your inner being. Real victory and genuine godliness take root and bear the unmistakable fruit of a Christ-filled life.