2 Corinthians 5:17 Therefore, if anyone is in Christ, he is a new creation; old things have passed away; behold, all things have become new. Break old ties. The old has passed,so when people see you, they must see the new you.
Romans 12:2 And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God.
Transformation means you have come out of the image of the world and you are moving towards the image of Christ. You must be completely stripped of every troubling sin or weight, staying away from that which you have been delivered from.
Hebrews 12:1 Therefore, since we are surrounded by such a huge crowd of witnesses to the life of faith, let us strip off every weight that slows us down, especially the sin that so easily trips us up. And let us run with endurance the race God has set before us.