34. But when the Pharisees heard that he had put the Sadducees to silence, they assembled together. 35. And one of them, a doctor of the law, put a question to him, tempting him, and saying, 36. Master, which is the great commandment in the law? 37. Jesus saith to him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. 38. This is the first and great commandment. 39. And the second is like it, Thou shalt love thy neighbor as much as thyself. 40. On these two commandments the whole law and the prophets depend.
Although I think that this narrative has nothing more than a resemblance to what is related by Matthew in the 22nd, and by Mark in the 12th chapter, of his Gospel, and that they are not the same; I have chosen to collect them into one place, because, while Matthew and Mark affirm that this was the last question by which our Lord was tempted, Luke makes no mention of that circumstance, and seems intentionally to leave it out, because he had stated it in another passage. And yet I do not dispute that it may be the same narrative, though Luke has some things different from the other two. They all agree in this, that the scribe put a question for the sake of tempting Christ; but he who is described by Matthew and Mark goes away with no bad disposition; for he acquiesces in Christ’s reply, and shows a sign of a teachable and gentle mind: to which must be added, that Christ, on the other hand, declares that he is not far from the kingdom of God. Luke, on the other hand, introduces a man who was obstinate and swelled with pride, in whom no evidence of repentance is discovered. Now there would be no absurdity in saying that Christ was repeatedly tempted on the subject of true righteousness, and of keeping the Law, and of the rule of a good life. But whether Luke has related this out of its proper place, or whether he has now passed by the other question — because that former narrative relating to doctrine was sufficient — the similarity of the doctrine seemed to require me to compare the three Evangelists with each other.
Let us now see what was the occasion that led this scribe to put a question to Christ. It is because, being an expounder of the Law, he is offended at the doctrine of the gospel, by which he supposes the authority of Moses to be diminished. At the same time, he is not so much influenced by zeal for the Law, as by displeasure at losing some part of the honor of his teaching. He therefore inquires at Christ, if he wishes to profess any thing more perfect than the Law; for, though he does not say this in words, yet his question is ensnaring, for the purpose of exposing Christ to the hatred of the people. Matthew and Mark do not attribute this stratagem to one man only, but show that it was done by mutual arrangement, and that out of the whole sect one person was chosen who was thought to excel the rest in ability and learning. In the form of the question, too, Luke differs somewhat from Matthew and Mark; for, according to him, the scribe inquires what men must do to obtain eternal life, but according to the other two Evangelists, he inquires what is the chief commandment in the law. But the design is the same, for he makes a deceitful attack on Christ, that, if he can draw any thing from his lips that is at variance with the law, he may exclaim against him as an apostate and a promoter of ungodly revolt.
Luke 10:26. What is written in the law? He receives from Christ a reply different from what he had expected. And, indeed, no other rule of a holy and righteous life was prescribed by Christ than what had been laid down by the Law of Moses; for the perfect love of God and of our neighbors comprehends the utmost perfection of righteousness. Yet it must be observed, that Christ speaks here about obtaining salvation, in agreement with the question which had been put to him; for he does not teach absolutely, as in other passages, how men may arrive at eternal life, but how they ought to live, in order to be accounted righteous in the sight of God. Now it is certain that in the Law there is prescribed to men a rule by which they ought to regulate their life, so as to obtain salvation in the sight of God. That the Law can do nothing else than condemn, and is therefore called the doctrine of death, and is said by Paul to increase transgressions, (Romans 7:13,) arises not from any fault of its doctrine, but because it is impossible for us to perform what it enjoins. Therefore, though no man is justified by the Law yet the Law itself contains the highest righteousness, because it does not falsely hold out salvation to its followers, if any one fully observed all that it commands. 1 Nor ought we to look upon this as a strange manner of teaching, that God first demands the righteousness of works, and next offers a gratuitous righteousness without works; for it is necessary that men should be convinced of their righteous condemnation, that they may betake themselves to the mercy of God. Accordingly, Paul (Romans 10:5, 6) compares both kinds of righteousness, in order to inform us that the reason why we are freely justified by God is, that we have no righteousness of our own. Now Christ in this reply accommodated himself to the lawyer, and attended to the nature of his question; for he had inquired not how salvation must be sought, but by what works it must be obtained.