When God saves a person He totally transforms Him. It is instant. There is no delay. 2 Corinthians 5:17 says he is a "new creation in Christ, old things are passed away; behold all things have become new." To practice the walk of the new man, we must offer ourselves as "living sacrifices" on the altar of God (Rom.12:1). In doing that we not only prevent ourselves from conforming to the world but we also renew our minds.
Are you offering yourself to God as a new creation in Christ? Stop listening to the world and begin listening to the Word.