Matthew 1
The Virgin Birth — Isaiah 7:14 and Matthew 1
Matt 1:22-23 reads the birth of Jesus as the fulfillment of Isa 7:14: "the virgin shall conceive and bear a son, and they shall call his name Immanuel." Matthew hears in Immanuel, "God with us," the whole meaning of the incarnation. Irenaeus saw the virgin birth as the new beginning of humanity, Mary undoing the knot of Eve. Aquinas defended its fittingness: the new creation requires a new origin. The sign given to faithless Ahaz becomes the sign to the world. The Immanuel theme frames the whole Gospel, returning in Matt 28:20, "I am with you always." It connects to the Word made flesh in John 1:14 and to the protoevangelium's promised seed in Gen 3:15.
The Trinity in the Great Commission — Matthew 28:19
Matt 28:18-20 commissions the church to baptize "in the name (singular) of the Father and of the Son and of the Holy Spirit." One name, three persons: the baptismal formula is implicitly trinitarian. Augustine's On the Trinity mined this text for the unity of the divine persons, and the Nicene Creed gave the church its trinitarian grammar. Basil and the Cappadocians defended the Spirit's full deity on such baptismal grounds. The baptism commanded here is unfolded theologically in Rom 6:3-4, and the abiding presence of 28:20 echoes the Immanuel of Matt 1:23. The triune name is the church's confession and its commission.
New Heavens and New Earth — Revelation 21
Rev 21:1-5 unveils the consummation: "a new heaven and a new earth... the dwelling place of God is with man... and he will wipe away every tear." Redemption ends not in heaven's escape but in a renewed creation. Augustine's City of God ends with this eternal Sabbath, the vision of God face to face, and Bavinck saw the new earth as creation brought to its destined glory. The covenant formula "God with them" reaches its final fulfillment. The renewed creation answers the first creation of Gen 1:1 and reverses the curse of Gen 3:17. The Immanuel promise of Matt 1:23 becomes eternal fact: God dwells with his people forever.