Römer 10:5

For Moses describeth the righteousness which is of the law, That the man that doeth--"hath done" those things--which it commands. shall live in them-- (Lev 18:5). This is the one way of justification and life--by "the righteousness which is of (or, by our own obedience to) the law."

The dissolving of the peculiar church-state of the Jews, and the rejection of that polity by the repealing of their ceremonial law, the vacating of all the institutions of it, the abolishing of their priesthood, the burning of their temple, and the taking away of their place and nation, and in their room the substituting and erecting of a catholic church-state among the Gentile nations, though to us, now that these things have long since been done and completed, they may seem no great matter, yet to those who lived when they were doing, who knew how high the Jews had stood in God's favour, and how deplorable the condition of the Gentile world had been for many ages, it appeared very great and marvellous, and a mystery hard to be understood. The apostle, in this chapter, as in the foregoing and that which follows, is explaining and proving it; but with several very useful digressions, which a little interrupt the thread of his discourse. To two great truths I would reduce this chapter: - I. That there is a great difference between the righteousness of the law, which the unbelieving Jews were wedded to, and the righteousness of faith offered in the gospel (Rom 10:1-11). II. That there is no difference between Jews and Gentiles; but, in point of justification and acceptance with God, the gospel sets them both upon the same level (Rom 10:12 to the end).

10:5 requires obedience to all of its commands: See Lev 18:5, where these words encouraged the Israelites to obey the law in order to enjoy long life and prosperity in the land that God was giving them (see also Lev 26:3-13; Deut 28:1-14). Paul sees the implication that if people want to be right with God through the law, they can only do so by obeying all of it.