(de Con. Evan. ii. 73) Nor let it trouble us that Matthew says, that he who addressed this question to the Lord tempted Him; for it may be that though he came as a tempter, yet he was corrected by the answer of the Lord. Or at all events, we must not look upon the temptation as evil, and done with the intention of deceiving an enemy, but rather as the caution of a man who wished to try a thing unknown to him.
(ubi sup.) He shows when he says, this is greater than all sacrifices, that a grave question was often debated between the scribes and Pharisees, which was the first commandment, or the greatest of the Divine law; that is, some praised offerings and sacrifices, others preferred acts of faith and love, because many of the fathers before the law pleased God by that faith only, which works by love. This scribe shows that he was of the latter opinion. But it continues, And when Jesus saw that he answered discreetly, he said unto him, Thou art not far from the kingdom of God.
(ubi sup) But the reason why he was not far from the kingdom of God was, that he proved himself to be a favourer of that opinion, which is proper to the New Testament and to Gospel perfection.
(ubi sup.) For since they were confuted in argument, they ask Him no farther questions, but take Him without any disguise, and give Him up to the Roman power. From which we understand that the venom of envy may be overcome, but can hardly lie quiet.
See how He has enumerated all the powers of the soul; for there is a 1living power in the soul, which He explains, when He says, With all thy soul, and to this belong anger and desire, all of which He will have us give to Divine love. There is also another power, which is called natural, to which belong nutriment and growth, and this also is all to be given to God, for which reason He says, With all thy heart. There is also another power, the rational, which He calls the mind, and that too is to be given whole to God.
He says that it is like, because these two commandments are harmonious one with the other, and mutually contain the other. For he who loves God, loves also His creature; but the chief of His creatures is man, wherefore he who loves God ought to love all men. But he who loves his neighbour, who so often offends him, ought much more to love Him, who is ever giving him benefits. And therefore on account of the connection between these commandments, He adds, There is none other commandment greater than these. It goes on: And the Scribe said unto him, Well, Master, thou hast said the truth: for there is one God, and there is none other but he: and to love him with all the heart, and with all the soul, and with all the understanding, and with all the strength, and to love his neighbour as himself, is more than all whole burnt offerings and sacrifices.
By which He shows that he was not perfect, for He did not say, Thou art within the kingdom of heaven, but, Thou art not far from the kingdom of God.
This question is only that which is a problem common to all skilled in the law, namely, that the commandments are differently set forth in Exodus, Leviticus, and Deuteronomy. Wherefore He brought forward not one but two commandments, by which, as by two paps rising on the breast of the bride, our infancy is nourished. And therefore there is added, And Jesus answered him, The first of all the commandments is, Hear, O Israel; the Lord thy God is one God. He mentions the first and greatest commandment of all; this is that to which each of us must give the first place in his heart, as the only foundation of piety, that is, the knowledge and confession of the Divine Unity, with the practice of good works, which is perfected in the love of God and our neighbour; wherefore there is added, Thou shalt love the Lord thy God with all thy heart, and with all thy mind, and with all thy soul, and with all thy strength: this is the first commandment.
Or else, he is not far who comes with knowledge; for ignorance is farther from the kingdom of God than knowledge; wherefore he says above to the Sadducees, Ye err, not knowing the Scriptures, or the power of God. It goes on: And no man after that durst ask him any questions.
(non occ.) That is, because they contradicted the Scriptures, and derogated from the power of God.
(non occ.) After that the Lord confuted the Pharisees, and the Sadducees, who tempted Him, it is here shown how He satisfied the Scribe who questioned Him; wherefore it is said, And one of the scribes came, and having heard them reasoning together, and perceiving that he had answered them well, asked him, Which is the first commandment of all?
(non occ.) The words which are added, And with all thy strength, may be referred to the bodily powers. It goes on: And the second is like, namely this, Thou shalt love thy neighbour as thyself.
For both to prophesy and to cast out devils, and to do great acts upon the earth is certainly a sublime and an admirable thing; but one does not attain the kingdom of heaven although he is found in all these things, unless he walks in the observance of the right and just way. The Lord denounces, and says, "Many shall say to me in that day, Lord, Lord, have we not prophesied in Thy name, and in Thy name have cast out devils, and in Thy name done many wonderful works? And then will I profess unto them, I never knew you: depart from me, ye that work iniquity." There is need of righteousness, that one may deserve well of God the Judge; we must obey His precepts and warnings, that our merits may receive their reward. The Lord in His Gospel, when He would direct the way of our hope and faith in a brief summary, said, "The Lord thy God is one God: and thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy strength. This is the first commandment; land the second is like unto it: Thou shall love thy neighbour as thyself. On these two commandments hang all the law and the prophets." He taught, at the same time, love and unity by His instruction. He has included all the prophets and the law in two precepts. But what unity does he keep, what love does he maintain or consider, who, savage with the madness of discord, divides the Church, destroys the faith, I disturbs the peace, dissipates charity, profanes the sacrament?
That God alone must be worshipped. "As it is written, Thou shall worship the Lord thy God, and Him only shalt thou serve." Also in Exodus: "Thou shalt have none other gods beside me." Also in Deuteronomy: "See ye, see ye that I am He, and that there is no God beside me. I will kill, and will make alive; I will smite, and I will heal; and there is none who can deliver out of mine hands." In the Apocalypse, moreover: "And I saw another angel fly in the midst of heaven, having the everlasting Gospel to preach over the earth, and over all nations, and tribes, and tongues, and peoples, saying with a loud voice, Fear God rather, and give glory to Him: for the hour of His judgment is come; and worship Him that made heaven and earth, and the sea, and all that therein is." So also the Lord, in His Gospel, makes mention of the first and second commandment, saying, "Hear, O Israel, The Lord thy God is one God; " and, "Thou shalt love thy Lord with all thy heart, and with all thy soul, and with all thy strength. This is the first; and the second is like unto it, Thou shall love thy neighbour as thyself. On these two commandments hang all the law and the prophets." And once more: "And this is life eternal, that they may know Thee, the only and true God, and Jesus Christ, whom Thou hast sent."
If sacred truth, when challenged by blasphemy, is met by silence, even that silence may be falsely construed as consent. This is what has happened in the case of the Arian assertion that because God is one, therefore his Son is not God.… The same one who authorizes us to confess the Son of God as God justifies us in proclaiming the one God.
Since God is one, it is ridiculous to suppose that there could be still another “Lord” of heaven and earth in addition to the Lord who is one. There is simply no room for a second Lord of all, if the one true God fills all things in the compass of heaven and earth.
For Moses, the faithful servant of God, when he said, "The Lord thy God is one Lord," and thus proclaimed that there was only one God, did yet forthwith confess also our Lord when he said, "The Lord rained upon Sodom and Gomorrah fire and brimstone from the Lord." And again, "And God said, Let Us make man after our image: and so God made man, after the image of God made He him." And further "In the image of God made He man." And that [the Son of God] was to be made man [Moses shows when] he says, "A prophet shall the Lord raise up unto you of your brethren, like unto me."
There is then one God and Father, and not two or three; One who is; and there is no other besides Him, the only true [God]. For "the Lord thy God," saith [the Scripture], "is one Lord." And again, "Hath not one God created us? Have we not all one Father? And there is also one Son, God the Word. For "the only-begotten Son," saith [the Scripture], "who is in the bosom of the Father." And again, "One Lord Jesus Christ." And in another place, "What is His name, or what His Son's name, that we may know? " And there is also one Paraclete. For "there is also," saith [the Scripture], "one Spirit," since "we have been called in one hope of our calling." And again, "We have drunk of one Spirit," with what follows. And it is manifest that all these gifts [possessed by believers] "worketh one and the self-same Spirit." There are not then either three Fathers, or three Sons, or three Paracletes, but one Father, and one Son, and one Paraclete. Wherefore also the Lord, when He sent forth the apostles to make disciples of all nations, commanded them to "baptize in the name of the Father, and of the Son, and of the Holy Ghost," not unto one [person] having three names, nor into three [persons] who became incarnate, but into three possessed of equal honour.
"But to those who are persuaded that He is evil, as the Scriptures say, He said, 'Call not me good, for One only is good.' And again, 'Be ye good and merciful, as your Father in the heavens, who makes the sun rise on good and evil men, and brings rain upon just and unjust.' But to those who were misled to imagine many gods, as the Scriptures say, He said, 'Hear, O Israel; the Lord your God is one Lord.'"
Here is the paradox of Christianity. As practical imperatives for here and now the two great commandments have to be translated "Behave as if you loved God and man." For no man can love because he is told to. Yet obedience on this practical level is not really obedience at all. And if a man really loved God and man, once again this would hardly be obedience; for if he did, he would be unable to help it. Thus the command really says to us, "Ye must be born again." Till then, we have duty, morality, the Law. A schoolmaster, as St. Paul says, to bring us to Christ. We must expect no more of it than of a schoolmaster; we must allow it no less. I must say my prayers today whether I feel devout or not; but that is only as I must learn my grammar if I am ever to read the poets.
[AD 430] Augustine of Hippo on Mark 12:28-34