It's not as if the New Testament writers came along and said, "The culmination of Old Testament books is more books, New Testament books." In some ways they thought instead of the culmination of Old Testament books being Christ himself, the word incarnate as the opening verses of Hebrews 1 put it. In the past God spoke to the fathers by the prophets, but in these last days he has spoken to us by his son and the son is revelation.
D. A. CarsonThe Christian's whole desire, at its best and highest, is that Jesus Christ be praised. It is always a wretched bastardization of our goals when we want to win glory for ourselves instead of for him.
D. A. CarsonSystematic theology will ask questions like "What are the attributes of God? What is sin? What does the cross achieve?" Biblical theology tends to ask questions such as "What is the theology of the prophecy of Isaiah? What do we learn from John's Gospel? How does the theme of the temple work itself out across the entire Bible?" Both approaches are legitimate; both are important. They are mutually complementary.
D. A. Carson