When you think about the biblical idea of “Testament”, we are not talking about just the 39 books of the Old Testament nor the 27 books of the New Testament. The books of the Bible are extremely important, but the Biblical idea of Testament is much more than just a name given to the collection of books in the Bible.
We learn in the New Testament, that everything in the Old Covenant ultimately pointed forward to Jesus! The Old Covenant was a foreshadow of better things to come in Christ!
With Jesus, the New Testament is no longer a bi-lateral covenant that depends on your faithful obedience; but it is truly a “last will and testament” where you are given an eternal inheritance because of His death on the cross. Jesus dies, and you are showered with all of God’s good gifts. The New Testament is 100% dependent on Jesus, not on you. The New Testament is pure grace, not works. The New Testament is Gospel Good News; not law, effort, wrath, nor judgment.