What Augustine so strikingly formulated concerning the relation of the two historic economies of the history of redemption: “Novum Testamentum in Vetere latet, Vetus in Novo patet” [The New Testament hides in the old, the Old reveals itself in the New] permits of application to the subject in hand. Here also there was a “new” and an “old,” but the substance was the same, not different in principle, and thus it came about that the one could be used to interpret the other. Revelation could make use of the preëstablished harmony which it had itself laid at the basis of its scheme.
Geerhardus Vos, The Pauline Eschatology (Princeton, NJ: Geerhardus Vos, 1930), 43.