Saturdays with Calvin #40

How did God begin to embrace with his favour those whom he had loved before the foundation of the world, unless in displaying his love when he was reconciled by the blood of Christ? As God is the fountain of all righteousness, he must necessarily be the enemy and judge of man so long as he is a sinner. Wherefore, the commencement of love is the bestowing of righteousness, as described by Paul: “He has made him to be sin for us who knew no sin; that we might be made the righteousness of God in him,” (2 Cor. 5:21). He intimates, that by the sacrifice of Christ we obtain free justification, and become pleasing to God, though we are by nature the children of wrath, and by sin estranged from him. This distinction is also noted whenever the grace of Christ is connected with the love of God (2 Cor. 13:13); whence it follows, that he bestows upon us of his own which he acquired by purchase. For otherwise there would be no ground for the praise ascribed to him by the Father, that grace is his, and proceeds from him.

Institutes of the Christian Religion 2.17.2 John Calvin, translated by Henry Beveridge, Hendrickson, pp. 340-341.