CCC 601
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The Scriptures had foretold this divine plan of salvation through the putting to death of "the righteous one, my Servant" as a mystery of universal redemption, that is, as the ransom that would free men from the slavery of sin. Is 53:11; cf. 53:12; Jn 8 34-36; Acts 3:14. Citing a confession of faith that he himself had "received", St. Paul professes that "Christ died for our sins in accordance with the scriptures." 1 Cor 15:3; cf. also Acts 3:18; 7:52; 13:29; 26:22-23. In particular Jesus' redemptive death fulfils Isaiah's prophecy of the suffering Servant. Cf. Is 53:7-8 and Acts 8:32-35. Indeed Jesus himself explained the meaning of his life and death in the light of God's suffering Servant. Cf. Mt 20:28. After his Resurrection he gave this interpretation of the Scriptures to the disciples at Emmaus, and then to the apostles. Cf. Lk 24:25-27, 44-45. "For our sake God made him to be sin"
Read the full chapter 2. I Believe in Jesus Christ, the Only Son of God ¶422–682