Mysteriously, sanctification is a combination of us working and God working (Philippians 2:12-13). We must choose to put in effort and energy in our efforts to kill sin (Romans 8:13). We must refuse to make excuses and take responsibility for our sin, not blaming others as if we are helpless victims in terms of our sin patterns and wrong attitudes being the fault of others. God is with us in our wrestle, he empowers us and fights with us and for us.