“…and be renewed in the spirit of your mind, and that you put on the new man which was created according to God, in true righteousness and holiness” Ephesians 4:23-24.
When you put off the old man you have to do one more thing: to put on the new one. You cannot just do one without the other. Both actions have to take place. We are not rejecting evil, we also do good. Transformation into a completely different personality (in terms of your nature, character, and habits) has to take place. It happens when we change the way we think. Then other changes follow automatically: way of speaking, habits, actions and lifestyle. But we have to do it. We cannot leave an empty place in our lives after we cast out evil. We have to inhabit good! Christ and the values of His Kingdom is that new man. That person has to start living inside of us.