[17] Now if you invoke as Father him who judges impartially according to each one's works, conduct yourselves with reverence during the time of your sojourning, [18] realizing that you were ransomed from your futile conduct, handed on by your ancestors, not with perishable things like silver or gold [19] but with the precious blood of Christ as of a spotless unblemished lamb. [20] He was known before the foundation of the world but revealed in the final time for you,
(CCC 517) Christ's whole life is a mystery of redemption. Redemption comes to us above all through the blood of his cross (Cf. Eph 1:7; Col 1:13-14; 2 Pt 1:18-19), but this mystery is at work throughout Christ's entire life: - already in his Incarnation through which by becoming poor he enriches us with his poverty (Cf. 2 Cor 8:9); - in his hidden life which by his submission atones for our disobedience (Cf. Lk 2:51); - in his word which purifies its hearers (Cf. Jn 15:3); - in his healings and exorcisms by which "he took our infirmities and bore our diseases" (Mt 8:17; cf. Isa 53:4); - and in his Resurrection by which he justifies us (Cf. Rom 4:25). (CCC 622) The redemption won by Christ consists in this, that he came "to give his life as a ransom for many" (Mt 20:28), that is, he "loved [his own] to the end" (Jn 13:1), so that they might be "ransomed from the futile ways inherited from [their] fathers" (1 Pt 1:18). (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 Pet 1:18-20). Man's sins, following on original sin, are punishable by death (Cf. Rom 5:12; 1 Cor 15:56). 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" (2 Cor 5:21; cf. Phil 2:7; Rom 8:3).
