We must be transformed

Sin operates through our physical body, and Paul dealt with this in detail in Romans chapter 7. Sin and disobedience are carried out through our members, and it is essential that we die to the flesh daily. Yes we are saved and new creatures, but we are not in our glorified bodies and the flesh will try to overthrow the new nature. In other words, we are aware of sin, and yet it is still present and desires to rule us.