After I became a Christian, the first verse that I memorized was from the Navigator Topical Memory System (TMS) and for me it was absolutely true:
“Therefore, if any man be in Christ, he is a new creature: old things are passed away; behold all things are become new!” (KJV).
The believer in Christ is changed. He realizes that his motto in the Christian life could easily be patterned after the words of John the Baptist when he states, “He must increase, but I must decrease” (John 3:30). The disciple of Christ wants to become more like Christ and less like self. Through the use of the means of grace (Scripture, prayer, the sacraments, worship and fellowship, etc.), he finds that his old life is no longer personally appealing and only a life that is conforming to Christ-likeness will satisfy. Of course, growth in the fruit of the Spirit and dying to the deeds of the flesh are true indicators of becoming more and more like Christ (Galatians 5:16-25).
“By this my Father is glorified, that you bear much fruit and so prove to be my disciples” (John 15:8).
Often this growth in Christ-likeness occurs in more obvious fashion during the time just after one becomes a Christian; deeper Christ-likeness is shaped and formed over the long haul, as God uses events, circumstances, others and even suffering to purify the dross and make His children more like gold (Psalm 66:10; Isaiah 48:9-11).
Each disciple of Christ willingly asks the question of himself, “Am I becoming more and more like Jesus in my attitudes, actions, choices and lifestyle?”