Is there a wall between the Old Testament and the New Testament?
No. The New Testament is not separated from the Old by a wall; it is an extension of the Old Testament program. The Old Testament prophecies concerning Abraham, Isaac, Jacob, Moses, and David are coming to fulfillment, and Christianity does not appear immediately at the start of the New Testament.
Les explains that many people think there is a big wall between the Old Testament and the New Testament, as though the New Testament is Christianity and everything else is by the boards. He says nothing could be further from the truth. The New Testament is just an extension of the Old Testament program. All the Old Testament prophecies are now coming to fulfillment, based on what God promised to Abraham, Isaac, and Jacob. Through Moses, the Law was another covenant. To David, God promised that the King would come from him. All of that looked forward, and it now comes in the New Testament as an extension of the Old. Les also points to Matthew 1:1, the book of the generation of Jesus Christ, the son of David, the son of Abraham, noting that the genealogy goes back to Abraham, not Adam, because the coming of the King and the Kingdom began with Abraham.