For we know that our old self was crucified with him so that the body ruled by sin might be done away with, that we should no longer be slaves to sin—” Romans 6:6
In salvation the cross took away the body ruled by sin. Those born of God can no longer be slaves to sin. By grace sin reign can no longer have rulership in our mortal bodies so as to obey the flesh's evil desires.” Romans 6:12.
As a child of God “Do not offer any part of yourself to sin as an instrument of wickedness, but rather offer yourselves to God as those who have been brought from death to life.” Romans 6:13. Offer yourself to God as an instrument of righteousness and walk in victory over the flesh. By grace you are a winner.