10 Reasons the Old Testament Is Important for Christians

by Jason DeRouchie

If Christians are part of the new covenant, why should we seek to understand and apply the Old Testament (OT)?

I’ll give 10 reasons why the first word in the phrase Old Testament must not mean unimportant or insignificant to Christians.

1. The OT was Jesus’s only Scripture and makes up three-fourths (75.55 percent) of our Bible.

If space says anything, the OT matters to God, who gave us his Word in a book. In fact, it was his first special revelation, which set a foundation for the fulfillment we find in Jesus in the New Testament (NT).

The OT was the only Bible of Jesus and the earliest church (e.g., Matt. 5:17; Luke 24:44; Acts 24:14; 2 Tim. 3:15), and it’s a major part of our Scriptures.

2. The OT substantially influences our understanding of key biblical teachings.

By the end of the Law (Genesis–Deuteronomy), the Bible has already described or alluded to all five of the major covenants that guide Scripture’s plot structure (Adamic-Noahic, Abrahamic, Mosaic, Davidic, and new). The rest of the OT then builds on this portrait in detail. Accordingly, the OT narrative builds anticipation for a better king, a blessed people, and a broader land. The OT creates the problem and includes promises that the NT answers and fulfills. We need the OT to understand fully God’s work in history…

10 Reasons the Old Testament Is Important for Christians