What does the Bible say about the transition from the Old Covenant to the New Covenant?

The transition from the Old Covenant, represented by Moses, to the New Covenant, represented by Joshua (or Jesus), is significant in biblical theology. This shift marks the end of reliance on the law, which was unable to bring the Israelites into the promised land, and introduces a new paradigm grounded in grace through faith in Christ. The author of Hebrews indicates that, in these last days, God speaks to us through His Son, establishing the final revelation of His grace (Hebrews 1:1-2). Moses represented the law and works, while Joshua symbolizes the promise and faith that allows believers to enter into God's rest, illustrating that only the New Covenant can save and bring into eternal life.