Why was the Old Testament written?
Romans 15:4 says, “For whatever was written in earlier times was written for our instruction, so that through perseverance and the encouragement of the Scriptures we might have hope.”
What does that mean? That the entire Old Testament was wisely directed by God to be instructive to both its present audience (Israel) and for later centuries as well (us). This means it is of infinitely great value to us today, because in it, God means to both instruct us give us hope through it. How does God instruct us and give us hope in it? By pointing us to Christ through foreshadows and types. The Old Testament is the appetizer which prepares the way for the greater meal to come!