Deuteronomy 6:25

"And righteousness will be to us, if we observe to do:" i.e., our righteousness will consist in the observance of the law; we shall be regarded and treated by God as righteous, if we are diligent in the observance of the law. "Before Jehovah" refers primarily, no doubt, to the expression, "to do all these commandments;" but, as we may see from Deu 24:13, this does not prevent the further reference to the "righteousness" also. This righteousness before Jehovah, it is true, is not really the gospel "righteousness of faith;" but there is no opposition between the two, as the righteousness mentioned here is not founded upon the outward (pharisaic) righteousness of works, but upon an earnest striving after the fulfilment of the law, to love God with all the heart; and this love is altogether impossible without living faith.

Moses, in this chapter, goes on with his charge to Israel, to be sure to keep up their religion in Canaan. It is much the same with ch. 4. I. His preface is a persuasive to obedience (Deu 4:1-3). II. He lays down the great principles of obedience. The first truth to be believed, That God is one (Deu 4:4). The first duty to be done, To love him with all our heart (Deu 4:5). III. He prescribes the means for keeping up religion (Deu 4:6-9). IV. He cautions them against those things which would be the ruin of religion - abuse of plenty (Deu 4:10-12), inclination to idolatry (Deu 4:14, Deu 4:15), and gives them some general precepts (Deu 4:13, Deu 4:16-18). V. He directs them what instructions to give their children (Deu 4:20, etc.).

6:25 righteous when we obey: Obedience shows that one is already in a state of righteousness, a standing before God obtained by faith (see 24:13; Hab 2:4; Rom 1:17; 4:1-5; Gal 3:6-7; see also Gen 15:6; Eph 2:8-9). When other nations observed Israel’s commitment to the covenant, they could rightly conclude that Israel was righteous.