Rom 6:19 I speak after the manner of men because of the infirmity of your flesh: for as ye have yielded your members servants to uncleanness and to iniquity unto iniquity; even so now yield your members servants to righteousness unto holiness. At the center of why a person would yield to uncleanness is a love for self. Equally, at the center of yielding to righteousness is a love for Christ over self.