Here Paul speaks of sin as if it were a king who ruled over people and made them unable to obey God and ultimately killing them, and he speaks of grace as if it were a king who might rule over people and enable them to be right with God. Alternate translation: "as people obeyed their desire to sin and therefore had to die ... God might show grace to people and allow them to be right with him" (See: [[rc://en/ta/man/translate/figs-personification]] and [[rc://en/ta/man/translate/figs-metaphor]])