Why is Biblical Theology important?
Biblical theology is an important discipline for several reasons; first, it helps us to determine what themes and truths of scriptures are really important, and why. As we seek to understand how the scriptures naturally unfold, and how its themes are developed and grow ever more mature, we start to realize what's truly being emphasized. If we relied on systematic theology alone, we might come to know many truths about angels and men and sin and redemption, but which of those truths are the most important? Which are the most emphasized and developed in the history of special revelation? Is it as important to know about cherubim and seraphim as it is to know about justification and redemption?
第二、圣经神学给我们一幅大略而完整的“构图”（big picture） ，向我们说明圣经真理是如何前后一贯、彼此相关的，以及整体的意义。圣经不是给我们作为一本有许多真理和教义的手册，而是基本上要作为一个如史诗般壮阔的故事，其中存在的真理都是要描绘一位伟大英雄的荣耀，祂是旧约圣经所应许，所预示，所预备的，祂终于降生来完成祂在新约圣经中宏伟而多面向的工作。单靠系统神学无法给我们圣经里这个史诗般的、以基督为中心的意思。圣经是统一的整体，见证神借着祂永恒的儿子，凯旋的基督，所作的大能的救赎工作。
Second, biblical theology gives us the “big picture,” and shows us how all the truths of the bible cohere and relate to each other, and make sense as a whole. The bible was not given to us as a handbook of various truths and doctrines, but fundamentally as an epic story, in which all truths exist to portray the glory of one great Hero, promised, foreshadowed, and prepared for in the Old Testament, and finally coming to accomplish his magnificent and many-faceted work in the New Testament. Systematic Theology alone does not give this epic, Christ-centered sense of the bible as one great unified whole, testifying to the mighty work of God's redemption through his eternal Son, the triumphant Christ.
Third, biblical theology can be helpful in demanding the application of a rigorous historical-grammatical hermeneutic in exegesis. Biblical theology, by its very nature, must take into account the history and context of special revelation, and answer the questions of why a particular book was written at a particular time, what problems it addressed, how it further prepared the world and the people of God for the coming of Christ, and so on; and for this reason, it can be a healthy corrective to any tendency toward careless “proof-texting”.