What significance does the New Testament have for Christians?
In the New Testament God’s revelation is completed. The four Gospels according to Matthew, Mark, Luke, and John are the centerpiece of Sacred Scripture and the most precious treasure of the Church. In them the Son of God shows himself as he is and encounters us. In the Acts of the Apostles we learn about the beginnings of the Church and the working of the Holy Spirit. In the letters written by the apostles, all facets of human life are set in the light of Christ. In the Book of Revelation we foresee the end of the ages.
Jesus is everything that God would like to tell us. The entire Old Testament prepares for the Incarnation of God’s Son. All of God’s promises find their fulfillment in Jesus. To be a Christian means to unite oneself ever more deeply with the life of Christ. To do that, one must read and live the Gospels. Madeleine Delbrêl says, “Through his Word God tells us what he is and what he wants; he says it definitively and says it for each individual day. When we hold our Gospel book in our hands, we should reflect that in it dwells the Word that wants to become flesh in us, desires to take hold of us, so that we might begin his life anew in a new place, at a new time, in a new human setting.”
CCC section (124-130)