Reply to Objection 3: To reward may also pertain to anyone: but to punish pertains to none but the framer of the law, by whose authority the pain is inflicted. Wherefore to reward is not reckoned an effect of law, but only to punish.
Reply to Objection 4: From becoming accustomed to avoid evil and fulfill what is good, through fear of punishment, one is sometimes led on to do so likewise, with delight and of one's own accord. Accordingly, law, even by punishing, leads men on to being good.