The New Covenant is more than a change in how people relate to God. It comes with specific promises attached. Scripture names what those promises are, points to when the covenant actually took effect, and even describes a sign that marks it. Here’s what the Bible says about each.
What Promises Does the New Covenant Include?
The New Covenant is first announced in Jeremiah 31:31-34, and the promises there are specific rather than vague. God says He will “put my law in their inward parts, and write it in their hearts” (Jeremiah 31:33 KJV) rather than only on stone tablets. He promises an unbroken relationship: “I will be their God, and they shall be my people” (Jeremiah 31:33 KJV). He promises that knowing God will no longer depend on someone else teaching it to you, “for they shall all know me, from the least of them unto the greatest of them” (Jeremiah 31:34 KJV). And He promises full forgiveness: “I will forgive their iniquity, and I will remember their sin no more” (Jeremiah 31:34 KJV). Hebrews 8:10-12 quotes this same promise almost word for word, applying it directly to what believers now have in Christ.
Put simply, the promises are: God’s law written on the heart rather than imposed from outside, a secure relationship between God and His people, direct and personal knowledge of God, and complete forgiveness that is not held against a person again.
When Did the New Covenant Start?
Jeremiah announced the New Covenant roughly six centuries before Christ, but announcing a promise and putting it into effect are two different things. The New Testament identifies the night before Jesus’s crucifixion as the moment the covenant was formally established. At the Last Supper, Jesus took the cup and told His disciples, “This cup is the new testament in my blood, which is shed for you” (Luke 22:20 KJV) — “testament” and “covenant” translate the same underlying word. Hebrews 9:15-17 explains why the timing matters: a covenant of this kind, like a will, only takes effect once the one who made it has died. So while the promise was spoken through Jeremiah, the covenant itself began at the cross, confirmed by the resurrection that followed.
What Is the Sign of the New Covenant?
Under the Old Covenant, circumcision served as the physical sign of belonging to God’s people (Genesis 17:11). The New Covenant has its own marks. The clearest is the Lord’s Supper itself — the bread and the cup Jesus instituted at that same Last Supper, which believers still share today as a direct, physical reminder of what the covenant cost and what it promises (Luke 22:19-20; 1 Corinthians 11:25-26). Alongside that outward sign, Scripture also describes an inward one: the gift of God’s own Spirit living in a believer. Ezekiel had foretold it this way: “A new heart also will I give you, and a new spirit will I put within you… I will put my spirit within you” (Ezekiel 36:26-27 KJV). Paul describes believers themselves as a kind of letter, “written not with ink, but with the Spirit of the living God; not in tables of stone, but in fleshy tables of the heart” (2 Corinthians 3:3 KJV). Where circumcision was a mark on the body, the New Covenant’s sign is a changed heart, made visible in the shared meal that points back to the promise.
Key Bible Verses
Jeremiah 31:33-34
“But this shall be the covenant that I will make with the house of Israel; After those days, saith the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people… for I will forgive their iniquity, and I will remember their sin no more.” (KJV)
Luke 22:20
“Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.” (KJV)
Ezekiel 36:26-27
“A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh. And I will put my spirit within you, and cause you to walk in my statutes.” (KJV)
Frequently Asked Questions
Is the New Covenant only for Israel, or for all believers?
Jeremiah’s promise was spoken to “the house of Israel,” but the New Testament describes Gentile believers as being grafted into that same promise through faith in Christ (Romans 11:17, Ephesians 2:12-13). Both Jewish and Gentile Christians share in the New Covenant’s forgiveness and relationship with God.
Does the New Covenant do away with the Ten Commandments?
The New Covenant changes where the law is written, from stone to the heart, more than it erases the law’s content. Christians differ on exactly how Old Testament law applies today, but the New Covenant’s promise is that God’s people would want to obey Him from the inside, not that obedience itself no longer matters.
Related Bible Topics
What Is the New Covenant in the Bible? | Common Questions About the Holy Spirit | What Does “Once Saved, Always Saved” Mean in the Bible?
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