Samuel Rutherford (Quaint Sermons, pp. 274–275):
Christ must be clothed with our sins, and we, again, must be clothed with His righteousness, and that is the fairest and the closest garment that any can be. Now this garment is called “the best garment;” and it is the king’s best garment, for it is the righteousness of our Lord. There may be good garments and better garments, but this is the best of all garments. Ay, this garment of Christ’s righteousness is better in respect of the event, and for us, than if Adam had stood in the state he was in, and so we to have been clothed with Adam’s righteousness. This is the best robe of all—the righteousness of God made ours, Phil. 3:9; the apostle says, “He counted all things but dung that he might win Christ; and be found in Him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith,” clothed with that righteousness, that is, the righteousness of Him who is both God and man. And look what wisdom of God is to be found here! and what goodness and loving-kindness! and such a supernatural providence that whereas the devil, that old serpent, had a mind by Adam’s fall to bring Adam and all his posterity in the compass of eternal damnation; yet the Lord has turned about the wheel, so that so many as belong to Him in His election shall get better [than] they lost in Adam, a more sure and permanent and glorious estate.