Biblical Theology in the tradition of Geerhardus Vos approaches the Bible as an organic drama of God's unfolding revelation through history. In distinction from doctrinal or systematic theology, biblical theology follows the progressively unfolding revelation of God's words and deeds through history. This linear aspect of revelation unites each revelatory event and proclamation both retrospectively and prospectively. Vos described the organic continuation of revelation in history as a flower expanding from bud to blossom. The blossom is retrospectively united to the bud; the bud is prospectively united to the blossom. One of the tasks/privileges of the interpreter of Scripture is to draw out these organic prospective and retrospective relationships. At the center of this organic unity is the person and work of our Savior, Jesus Christ. Even as our Risen Lord related all of Scripture retrospectively and prospectively to himself (Luke 24:27), so Reformed biblical theology is preeminently Christocentric. We seek to display Christ in Scripture from Genesis to Revelation.
by Martin Luther
“When I am converted by the Gospel, the Holy Spirit is present. He takes me as clay and makes of me a new creature, which is endowed with a different mind, heart, and thoughts, that is, with a true knowledge of God and a sincere trust in His grace.
To summarize, the very essence of my heart is renewed and changed. This makes me a new plant, one that is grafted on Christ the Vine and grows from Him. My holiness, righteousness, and purity do not stem from me, nor do they depend on me. They come solely from Christ and are based only in Him, in whom I am rooted by faith, just as the sap flows from the stalk into the branches. Now I am like Him and of His kind. Both He and I are of one nature and essence, and I bear fruit in Him and through Him. This fruit is not mine; it is the Vine’s.
Thus Christ and the Christians become one loaf and one body, so that the Christian can bear good fruit—not Adam’s or his own, but Christ’s. For when a Christian baptizes, preaches, consoles, exhorts, works, and suffers, he does not do this as a man descended from Adam; it is Christ who does this in him.
The lips and tongue with which he proclaims and confesses God’s Word are not his; they are Christ’s lips and tongue. The hands with which he toils and serves his neighbor are the hands and members of Christ, who, as He says here, is in him; and he is in Christ.
Behold, with the words ‘He who abides in Me, and I in him’ (John 15:5) Christ wants to indicate that Christianity is not brought in from without; it is not put on like a garment, nor does it consist in the adoption of a new manner of living, which, like monasticism and self-chosen sanctity, is concerned with works.