Romans 13:10

2. But that this is the first and greatest commandment, and that the next [has respect to love] towards our neighbour, the Lord has taught, when He says that the entire law and the prophets hang upon these two commandments. Moreover, He did not Himself bring down [from heaven] any other commandment greater than this one, but renewed this very same one to His disciples, when He enjoined them to love God with all their heart, and others as themselves. But if He had descended from another Father, He never would have made use of the first and greatest commandment of the law; but He would undoubtedly have endeavoured by all means to bring down a greater one than this from the perfect Father, so as not to make use of that which had been given by the God of the law. …

The most of men have a disposition unstable and heedless, like the nature of storms. “Want of faith has done many good things, and faith evil things.” And Epicharmus says, “Don’t forget to exercise incredulity; for it is the sinews of the soul.” Now, to disbelieve truth brings death, as to believe, life; and again, to believe the lie and to disbelieve the truth hurries to destruction. The same is the case with self-restraint and licentiousness. To restrain one’s self from doing good is the work of vice; but to keep from wrong is the beginning of salvation. So the Sabbath, by abstinence from evils, seems to indicate self-restraint. …

“God,” then, being good, “is love,” it is said. Whose “love worketh no ill to his neighbour,” neither injuring nor revenging ever, but, in a word, doing good to all according to the image of God. “Love is,” then, “the fulfilling of the law;” like as Christ, that is the presence of the Lord who loves us; and our loving teaching of, and discipline according to Christ. By love, then, the commands not to commit adultery, and not to covet one’s neighbour’s wife, are fulfilled, [these sins being] formerly prohibited by fear.

38. If you do not consider that I have now written enough in answer to your questions, you must have little knowledge of my capacities or of my engagements. For so far am I from being, as you have thought, ac quainted with everything, that I read nothing in your letter with more sadness than this statement, both because it is most manifestly untrue, and because I am surprised that you should not be aware, that not only are many things unknown to me in countless other departments, but that even in the Scriptures themselves the things which I do not know are many more than the things which I know. But I cherish a hope in the name of Christ, which is not without its reward, because I have not only believed the testimony of my God that “on these two commandments hang all the Law and the Prophets;” but I have myself proved it, and daily prove it, by experience. …

20. It seems to me important to ascertain precisely what is that submission to the law which the apostle here condemns; for I do not think that he speaks here of circumcision merely, or of the sacrifices then offered by our fathers, but now not offered by Christians, and other observances of the same nature. I rather hold that he includes also that precept of the law, “Thou shalt not covet,” which we confess that Christians are unquestionably bound to obey, and which we find most fully proclaimed by the light which the Gospel has shed upon it. …

3. The law, therefore, by teaching and commanding what cannot be fulfilled without grace, demonstrates to man his weakness, in order that the weakness thus proved may resort to the Saviour, by whose healing the will may be able to do what in its feebleness it found impossible. So, then, the law brings us to faith, faith obtains the Spirit in fuller measure, the Spirit sheds love abroad in us, and love fulfils the law. For this reason the law is called a “schoolmaster,” under whose threatenings and severity “whosoever shall call upon the name of the Lord shall be delivered.” But how shall they call on Him in whom they have not believed?” Wherefore unto them that believe and call on Him the quickening Spirit is given, lest the letter without the Spirit should kill them. …

11. Far be it, however, from any believer to think that so many thousands of the servants of Christ, who, lest they should deceive themselves, and the truth should not be in them, sincerely confess themselves to have sin, are altogether without virtue! For wisdom is a great virtue, and wisdom herself has said to man, “Behold the fear of the Lord, that is wisdom.” Far be it from us, then, to say that so many and so great believing and pious men have not the fear of the Lord, which the Greeks call εὐσέβεια , or more literally and fully, θεοσέβεια . …

16. If these things be so, how shall a man who shall keep the whole law, and yet offend in one point, be guilty of all? May it not be, that since the fulfilling of the law is that love wherewith we love God and our neighbour, on which commandments of love “hang all the law and the prophets,” he is justly held to be guilty of all who violates that on which all hang? Now, no one sins without violating this love; “for this, thou shalt not commit adultery; thou shall do no murder; thou shall not steal; thou shalt not covet; and if there be any other commandment, it is briefly comprehended in this saying, Thou shall love thy neighbour as thyself. …

13. It is impossible for us to tell how greatly we desire to find in the writings of these men, whose works are read by very many for their pungency and eloquence, the open confession of that grace which the apostle vehemently commends, who says that “God has given to every man the measure of faith,” “without which it is impossible to please God,” “by which the just live,” “which worketh by love,” before which and without which no works of any man are in any respect to be reckoned good, since “whatsoever is not of faith is sin.” He affirms that God distributes to every man, and that we receive divine assistance to live piously and justly, not only by the revelation of that knowledge which without charity “puffeth up,” but by our being inspired with that “love which is the fulfilling of the law,” and which so edifies our heart that knowledge does not puff it up. …

2. All is contained in these brief sentences: “Love the Lord thy God with all thy heart, and with all thy soul, and with all thy strength: and love thy neighbour as thyself;” for these are the words in which the Lord, when on earth, gave an epitome of religion, saying in the gospel, “On these two commandments hang all the law and the prophets.” Daily advance, then, in this love, both by praying and by well-doing, that through the help of Him, who enjoined it on you, and whose gift it is, it may be nourished and increased, until, being perfected, it render you perfect. “For this is the love which,” as the apostle says, “is shed abroad in our hearts by the Holy Ghost, which is given unto us.” This is “the fulfilling of the law;” this is the same love by which faith works, of which he says again, “Neither circumcision availeth anything, nor uncircumcision; but faith, which worketh by love.”

And therefore neither ought such persons as lead an abandoned and damnable life to be confident of salvation, though they persevere to the end in the communion of the Church catholic, and comfort themselves with the words, “He that endureth to the end shall be saved.” By the iniquity of their life they abandon that very righteousness of life which Christ is to them, whether it be by fornication, or by perpetrating in their body the other uncleannesses which the apostle would not so much as mention, or by a dissolute luxury, or by doing any one of those things of which he says, “They who do such things shall not inherit the kingdom of God.” Consequently, they who do such things shall not exist anywhere but in eternal punishment, since they cannot be in the kingdom of God. …

32. And so also the Apostle Paul teaches when he says: “For this, Thou shall not commit adultery, Thou shall not kill, Thou shall not steal, Thou shalt not bear false witness, Thou shall not covet; and if there be any other commandment, it is briefly comprehended in this saying, namely, Thou shall love thy neighbor as thyself. Love worketh no ill to his neighbor.” Whoever then supposes that the apostle did not embrace every man in this precept, is compelled to admit, what is at once most absurd and most pernicious, that the apostle thought it no sin, if a man were not a Christian or were an enemy, to commit adultery with his wife, or to kill him, or to covet his goods. And as nobody but a fool would say this, it is clear that every man is to be considered our neighbor, because we are to work no ill to any man.