Revelation, the history of the Covenant, is preserved in the Church. Therefore, Scriptures, which is recorded revelation, belonged to the Church, and the Church is the proper and primary interpreter of Holy Scripture and revelation. This paper elucidates why and in what sense do we still keep both the Law and the Prophets, and what can be the right use of the Old Testament in the Church of Christ, i.e. what is the theological use of the Bible.