Nancy Guthrie in her book, "The Promised One?" says the Old Testament is an uncompleted story. As it ends, the people are still waiting for the fulfillment of the Promise. The Old Testament was to provide the context with which we could understand the necessity of suffering and the certainty of glorification. It is the foundation of all we need to know about Jesus, God and the Holy Spirit. Salvation, the cross, resurrection and glorification made little sense without an understanding of the Old Testament.