CCC 602 Consequently, St. Peter can formulate the apostolic faith in the divine plan of salvation in this way: “You were ransomed from the futile ways inherited from your fathers. .. with the precious blood of Christ, like that of a lamb without blemish or spot. He was destined before the foundation of the world but was made manifest at the end of the times for your sake.”¹ Man’s sins, following on original sin, are punishable by death.² By sending his own Son in the form of a slave, in the form of a fallen humanity, on account of sin, God “made him to be sin who knew no sin, so that in him we might become the righteousness of God.”³

1 I Pt 1:18-20.
2 Cf. Rom 5:12; I Cor 15:56.
3 2 Cor 5:21; cf. Phil 2:7; Rom 8:3.