Romans 10:6-8

6. But the righteousness which is by faith, etc. This passage is such as may not a little disturb the reader, and for two reasons — for it seems to be improperly applied by Paul — and the words are also turned to a different meaning. Of the words we shall hereafter see what may be said: we shall first notice the application. It is a passage taken from Deuteronomy 30:12, where, as in the former passage, Moses speaks of the doctrine of the law, and Paul applies it to evangelic promises. This knot may be thus untied: — Moses shows, that the way to life was made plain: for the will of God was not now hid from the Jews, nor set far off from them, but placed before their eyes. If he had spoken of the law only, his reasoning would have been frivolous, since the law of God being set before their eyes, it was not easier to do it, than if it was afar off. He then means not the law only, but generally the whole of God’s truth, which includes in it the gospel: for the word of the law by itself is never in our heart, no, not the least syllable of it, until it is implanted in us by the faith of the gospel. And then, even after regeneration, the word of the law cannot properly be said to be in our heart; for it demands perfection, from which even the faithful are far distant: but the word of the gospel has a seat in the heart, though it does not fill the heart; for it offers pardon for imperfection and defect. And Moses throughout that chapter, as also in the fourth, endeavors to commend to the people the remarkable kindness of God, because he had taken them under his own tuition and government, which commendation could not have belonged to the law only. It is no objection that Moses there speaks of forming the life according to the rule of the law; for the spirit of regeneration is connected with the gratuitous righteousness of faith. Nor is there a doubt but that this verse depends on that main truth, “the Lord shall circumcise thine heart,” which he had recorded shortly before in the same chapter. They may therefore be easily disproved, who say that Moses speaks only in that passage of good works. That he speaks of works I indeed allow; but I deny it to be unreasonable, that the keeping of the law should be traced from its own fountain, even from the righteousness of faith. The explanation of the words must now follow.

Say not in thine heart, Who shall ascend? etc. Moses mentions heaven and the sea, as places remote and difficult of access to men. But Paul, as though there was some spiritual mystery concealed under these words, applies them to the death and resurrection of Christ. If any one thinks that this interpretation is too strained and too refined, let him understand that it was not the object of the Apostle strictly to explain this passage, but to apply it to the explanation of his present subject. He does not, therefore, repeat verbally what Moses has said, but makes alterations, by which he accommodates more suitably to his own purpose the testimony of Moses. He spoke of inaccessible places; Paul refers to those, which are indeed hid from the sight of us all, and may yet be seen by our faith. If then you take these things as spoken for illustration, or by way of improvement, you cannot say that Paul has violently or inaptly changed the words of Moses; but you will, on the contrary, allow, that without loss of meaning, he has, in a striking manner, alluded to the words heaven and the sea.