Love doeth no evil to a neighbor, etc. He demonstrates by the effect, that under the word love are contained those things which are taught us in all the commandments; for he who is endued with true love will never entertain the thought of injuring others. What else does the whole law forbid, but that we do no harm to our neighbor? This, however, ought to be applied to the present subject; for since magistrates are the guardians of peace and justice, he who desires that his own right should be secured to every one, and that all may live free from wrong, ought to defend, as far as he can, the power of magistrates. But the enemies of government show a disposition to do harm. And when he repeats that the fulfilling of the law is love, understand this, as before, of that part of the law which refers to mankind; for the first table of the law, which contains what we owe to God, is not here referred to at all.

Love worketh no ill - Love would seek to do him good; of course it would prevent all dishonesty and crime toward others. It would prompt to justice, truth, and benevolence. If this law were engraved on every man's heart, and practiced in his life, what a change would it immediately produce in society! If all people would at once "abandon" what is suited to "work ill" to others, what an influence would it have on the business and commercial affairs of people. How many plans of fraud and dishonesty would it at once arrest. How many schemes would it crush. It would silence the voice of the slanderer; it would stay the plans of the seducer and the adulterer; it would put an end to cheating, and fraud, and all schemes of dishonest gain. The gambler desires the property of his neighbor without any compensation; and thus works "ill" to him. The dealer in "lotteries" desires property for which he has never toiled, and which must be obtained at the expense and loss of others. And there are many "employments" all whose tendency is to work "ill" to a neighbor. This is pre-eminently true of the traffic in "ardent spirits." It cannot do him good, and the almost uniform result is to deprive him of his property, health, reputation, peace, and domestic comfort. He that sells his neighbor liquid fire, knowing what must be the result of it, is not pursuing a business which works no ill to him; and love to that neighbor would prompt him to abandon the traffic; see Habakkuk 2:15, "Wo unto him that giveth his neighbor drink, that putteth thy bottle to him, and makest him drink also, that thou mayest look on their nakedness."
Therefore - "Because" love does no harm to another, it is "therefore" the fulfilling of the Law, implying that all that the Law requires is to "love" others.
Is the fulfilling - Is the "completion," or meets the requirements of the Law. The Law of God on this "head," or in regard to our duty to our neighbor, requires us to do justice toward him, to observe truth, etc. "All" this will be met by "love;" and if people truly "loved" others, all the demands of the Law would be satisfied.
Of the law - Of the Law of Moses, but particularly the Ten Commandments.

Love worketh no ill - As he that loves another will act towards that person as, on a reverse of circumstances, he would that his neighbor should act towards him; therefore, this love can never work ill towards another: and, on this head, i.e. the duty we owe to our neighbor, love is the fulfilling of the law.

Love worketh no ill to his neighbour,.... That is, the man that truly loves his neighbour, will contrive no ill against him, nor do any to him; he will not injure his person, nor defile his bed, nor deprive or defraud him of his substance; or do hurt to his character, bear false testimony against him, or covet with an evil covetousness anything that is his; but, on the contrary, will do him all the good he is capable of:
therefore love is the fulfilling of the law: so far as a man loves his neighbour, he acts agreeably to the law, and the particular precepts of it above mentioned: what the apostle says of love to the neighbour, the Jews frequently say of love to God;
"he that loveth God (they say (d)) , "hath fulfilled the decalogue", both above and below.''
And again (e),
"there is no service like the love of God, R. Abba saith it is , "the sum of the law"; for the ten words of the law , "are herein comprehended", or "fulfilled":''
and elsewhere (f) they observe,
"that , "the whole law is comprehended", or fulfilled "in love".''
(d) Zohar in Deut. fol. 111. 3. (e) Zohar in Deut. fol. 113. 1. (f) Moses Kotsensis Mitzvot Tora, praecept. affirm. 3. prope finem.

Love worketh no ill to his--or, "one's"
neighbour; therefore, &c.--As love, from its very nature, studies and delights to please its objects, its very existence is an effectual security against our wilfully injuring him. Next follow some general motives to the faithful discharge of all these duties.

Therefore love is the fulfilling of the law - For the same love which restrains from all evil, incites us to all good.