5:19,20 It is no mark of a wise or holy man, to boast of being free from error, or to refuse to acknowledge an error. And there is some doctrinal mistake at the bottom of every practical mistake. There is no one habitually bad, but upon some bad principle. This is conversion; to turn a sinner from the error of his ways, not merely from one party to another, or from one notion and way of thinking to another. There is no way effectually and finally to hide sin, but forsaking it. Many sins are hindered in the party converted; many also may be so in others whom he may influence. The salvation of one soul is of infinitely greater importance than preserving the lives of multitudes, or promoting the welfare of a whole people. Let us in our several stations keep these things in mind, sparing no pains in God's service, and the event will prove that our labour is not in vain in the Lord. For six thousand years He has been multiplying pardons, and yet his free grace is not tired nor grown weary. Certainly Divine mercy is an ocean that is ever full and ever flowing. May the Lord give us a part in this abundant mercy, through the blood of Christ, and the sanctification of the Spirit.
20. Let him—the converted.
know—for his comfort, and the encouragement of others to do likewise.
shall save—future. The salvation of the one so converted shall be manifested hereafter.
shall hide a multitude of sins—not his own, but the sins of the converted. The Greek verb in the middle voice requires this. Pr 10:12 refers to charity "covering" the sins of others before men; James to one's effecting by the conversion of another that that other's sins be covered before God, namely, with Christ's atonement. He effects this by making the convert partaker in the Christian covenant for the remission of all sins. Though this hiding of sins was included in the previous "shall save," James expresses it to mark in detail the greatness of the blessing conferred on the penitent through the converter's instrumentality, and to incite others to the same good deed.