10:5-11 The self-condemned sinner need not perplex himself how this righteousness may be found. When we speak of looking upon Christ, and receiving, and feeding upon him, it is not Christ in heaven, nor Christ in the deep, that we mean; but Christ in the promise, Christ offered in the word. Justification by faith in Christ is a plain doctrine. It is brought before the mind and heart of every one, thus leaving him without excuse for unbelief. If a man confessed faith in Jesus, as the Lord and Saviour of lost sinners, and really believed in his heart that God had raised him from the dead, thus showing that he had accepted the atonement, he should be saved by the righteousness of Christ, imputed to him through faith. But no faith is justifying which is not powerful in sanctifying the heart, and regulating all its affections by the love of Christ. We must devote and give up to God our souls and our bodies: our souls in believing with the heart, and our bodies in confessing with the mouth. The believer shall never have cause to repent his confident trust in the Lord Jesus. Of such faith no sinner shall be ashamed before God; and he ought to glory in it before men.
8. But what saith it? It saith—continuing the quotation from De 30:14.
The word is nigh thee—easily accessible.
in thy mouth—when thou confessest Him.
and in thine heart—when thou believest on Him. Though it is of the law which Moses more immediately speaks in the passage quoted, yet it is of the law as Israel shall be brought to look upon it when the Lord their God shall circumcise their heart "to love the Lord their God with all their heart" (Ro 10:6); and thus, in applying it, the apostle (as Olshausen truly observes) is not merely appropriating the language of Moses, but keeping in the line of his deeper thought.
that is, the word of faith, which we preach—that is, the word which men have to believe for salvation (compare 1Ti 4:6).