Paul is reminding the Corinthians of the essential truth he has shared with them, which is the foundation of the Christian faith. He stresses the importance of the message that Christ died for our sins, fulfilling the prophecies and promises found in the Scriptures. This statement is not just a historical fact but a profound theological truth that underscores the purpose of Jesus' sacrifice. It signifies God's plan for redemption and reconciliation with humanity.
By saying "according to the Scriptures," Paul is linking the events of Jesus' death to the Old Testament prophecies, showing that Jesus' mission was part of God's divine plan. This connection provides assurance to believers that their faith is rooted in a long-standing divine promise. It also emphasizes the continuity of God's plan throughout history, reinforcing the reliability and truth of the Christian message. This foundational belief is meant to unify and strengthen the community of believers, reminding them of the core of their faith and the hope it brings.