Acts 13:39

And by him all that believe are justified from all things,.... Christ, as God, is not only the justifier of his people, who pronounces them righteous in the sight of God; but his righteousness imputed to them is the matter of their justification, or that by which they are justified; and not the works of the law, or obedience to the Gospel, or internal holiness, either in whole or in part, or the grace of faith, but the object of it, Christ, and his righteousness: and justification by this is complete and perfect; it is from all sin, original and actual, secret and open, greater or lesser sins; sins of presumption and ignorance, of omission or commission; from all things the law can charge with, as breaches of it; from all things which the justice of God can demand satisfaction for; and from all things that Satan, or a man's own conscience, can justly accuse him of. And those that believe in Christ with the heart unto righteousness, are openly and manifestly justified in their own consciences, and can claim their interest in it, and have the comfort of it, as well as they were before secretly justified in the mind of God, and in their head and representative Jesus Christ. And from all sin these are justified of God, as Beza's ancient copy reads, "for it is God that justifies", Romans 8:33 against whom men have sinned, and whose law they have violated, and whose justice they have affronted, by reason of which they are liable to condemnation; but God justifies them, by imputing the righteousness of his Son to them, in which he views them as without fault, unblamable and irreprovable; and though all men are not justified, yet many are; even all the seed of Israel, all the elect of God, everyone that believes in Christ, as all do who are ordained to eternal life; Christ's righteousness is imputed and applied to all these, and therefore they shall never enter into condemnation, but shall be acquitted and discharged from all things,

from which, it is added,

ye could not be justified by the law of Moses; that is, by the works of the law, or by obedience to it, because such obedience is imperfect; and therefore the law cannot justify, discharge, and acquit upon it, but instead thereof, must curse and condemn; as it does everyone, that does not do all things commanded in the law, and in the manner that requires; besides, if righteousness was hereby, the grace of God in justification would be frustrated, the death of Christ would be rendered null and void, and boasting would not be excluded; all which are contrary to the scheme of the Gospel. It may be observed, that pardon of sin and justification are two distinct blessings, or the apostle must be guilty of a great tautology; since having spoken of forgiveness of sin in the preceding verse, he speaks of justification in this, as another blessing enjoyed by and through Christ, and published in the Gospel, styled therefore the word and ministration of righteousness. And indeed they are distinct; in pardon the man is considered as a sinner, in justification as a righteous man; pardon takes away his sin, justification gives him a righteousness; pardon frees from punishment, but justification besides that gives him a title to eternal life; to pardon, the blood of Christ is sufficient; but to justification are required the holiness of Christ's nature, the perfect obedience of his life, as well as his suffering of death; moreover, justification passed on Christ as the head and representative of his people, but not pardon; he may be said to be justified, but not pardoned: these two blessings make a considerable figure in the ministry of the word.