How does the New Covenant relate to the everlasting covenant?

The New Covenant is the manifestation of God's everlasting covenant made before time, which is centered on the redemptive work of Christ. This covenant was established for a chosen people and is realized in history through the life, death, and resurrection of Jesus. It signifies the beginning of the Church Age, during which the gospel is preached to both Jews and Gentiles. Thus, the New Covenant illustrates how God's eternal purpose is actively accomplished in time and space (Galatians 4:4).