Harmony Of The Law Volume 3 by Jean Calvin
If thou meet thine enemy's ox. From these two passages it is very clear that he who abstains from evil doing, is not therefore guiltless before God, unless he also studies to do good. For our brethren's advantage ought to be so far our care, that we should be disposed mutually to aid each other as far as our means and opportunities permit. This instruction is greatly needed; because, whilst everybody is more attentive to his own advantage than he ought to be, he is willing to hold back from the assistance of others. But God brings him in guilty of theft who has injured his neighbors by his negligence; and justly, because it depended only upon him that the thing should be safe, which he knowingly and willfully suffered to perish. This duty, too, is extended even to enemies; wherefore our inhumanity is the more inexcusable, if we have not helped our friends. The sum therefore is, that believers should be kind, that they may imitate their heavenly Father; and should not only bestow their labor upon the good, who are worthy of it, but should treat the unworthy also with kindness: and since many might invent means of subterfuge, God anticipates them, and commands that the beast of a person unknown should be kept until reclaimed by its owner; and lays down the same rule as to all things that may be lost.