Romans 6:13
Neither yield ye your members as instruments of unrighteousness unto sin: but yield yourselves unto God, as those that are alive from the dead, and your members as instruments of righteousness unto God.
We must not present the members of our body to sin, to be used as weapons or tools of wickedness. Our obligation is to turn the control of our members over to God, to be used in the cause of righteousness. We have been raised to life from death and we should walk in newness of life.