Salvation in Christ · The Covenant
diathēkē · covenant, testament · Heb בְּרִית, berit · the New Covenant in His blood
God binding Himself to His people by promise — sealed in blood, fulfilled in Christ, kept by God Himself
One word · covenant, testament
διαθήκη (Heb בְּרִית, berit) is a covenant — a binding, sworn relationship, often ratified with blood. God is a covenant-making God who binds Himself to His people by promise: “I will be God to you and to your descendants” (Gen 17:7). In Genesis 15, God alone passed between the pieces — taking the obligation on Himself.
The covenants unfold one plan — Abraham, Sinai, David — all pointing to the climax: the New Covenant promised by Jeremiah and established in Christ’s blood. “This cup is the new covenant in My blood” (Luke 22:20). It is “a better covenant, founded on better promises” (Heb 8:6) — and it is kept, finally, by the faithfulness of God.
Covenant as God's self-binding promise; sealed in blood; the Old Covenant at Sinai; the New Covenant in Christ; and the everlasting covenant God Himself keeps.
A bond He initiates by grace.
בַּיּוֹם הַהוּא כָּרַת יְהוָה … בְּרִית
… karat YHWH … berit — the LORD cut a covenant
on that day the LORD made a covenant with Abram.
Covenant is God’s initiative, not ours — “I will establish My covenant … to be God to you” (Gen 17:7). In Genesis 15, God alone passed between the pieces while Abram slept, taking the whole obligation on Himself. We do not earn our way into covenant; God binds Himself to us by sheer grace and promise.
A covenant ratified by sacrifice.
הִנֵּה דַם־הַבְּרִית אֲשֶׁר כָּרַת יְהוָה עִמָּכֶם
hinneh dam-habberit — the blood of the covenant
behold, the blood of the covenant which the LORD has made with you.
Covenants were ratified with blood, for “without the shedding of blood there is no forgiveness” (Heb 9:22). Blood seals the bond — the very words Jesus took up at the table: “this is My blood of the covenant” (Matt 26:28). The cross is where the New Covenant was sealed. (See the studies on the Blood and Communion.)
Good, but unable to perfect.
ὥστε ὁ νόμος παιδαγωγὸς ἡμῶν γέγονεν εἰς Χριστόν
… ho nomos paidagōgos hēmōn …
so the law was our tutor to bring us to Christ, that we might be justified by faith.
The covenant at Sinai (Exod 19–24) was good and holy, but conditional — “if you obey” — and it could not change the heart or make anyone perfect (Heb 7:18–19). It revealed sin and pointed forward, a tutor leading to Christ. It was always meant to give way to something better.
Promised by Jeremiah, sealed in His blood.
הִנֵּה יָמִים בָּאִים … וְכָרַתִּי … בְּרִית חֲדָשָׁה
… berit chadashah — a new covenant
behold, days are coming … when I will make a new covenant with the house of Israel.
“I will put My law within them and write it on their hearts … and I will forgive their iniquity” (Jer 31:33–34). Jesus fulfilled it: “this cup is the new covenant in My blood” (Luke 22:20). Better promises — a changed heart, the indwelling Spirit, full forgiveness, all secured by His blood (Heb 8:6–13).
Our security rests on His faithfulness.
… ἐν αἵματι διαθήκης αἰωνίου
… diathēkēs aiōniou — everlasting covenant
…through the blood of the everlasting covenant.
God “keeps covenant” (Deut 7:9); the New Covenant cannot be broken from His side, for Jesus is its guarantee and mediator (Heb 7:22; 9:15). Our security rests not on our covenant-keeping but on His covenant faithfulness — a bond as sure as the word and oath of God. (See the study on eternal security.)
The covenant is wronged two ways. On one side, presumption — claiming covenant as a birthright or a ritual while the heart is far from God, even trampling the blood that sealed it. On the other, regression — dragging the New Covenant of grace back under the Old Covenant’s law, binding believers to what Christ has fulfilled and set aside. The way between is faith: receive the New Covenant by faith, live as His covenant people, and never go back to Sinai.
… τὸ αἷμα τῆς διαθήκης κοινὸν ἡγησάμενος
… to haima … koinon hēgēsamenos
…who has counted the blood of the covenant a common thing.
To presume on covenant while despising the blood that sealed it is grave (Heb 10:26–31); Israel itself broke the covenant (Jer 31:32). Covenant is no mere ritual or inherited status — it calls for living faith and a yielded heart. Do not treat as common the blood that bought you.
… μὴ πάλιν ζυγῷ δουλείας ἐνέχεσθε
… zygō douleias — a yoke of slavery
stand firm, then, and do not be entangled again with a yoke of slavery.
The opposite error drags the New Covenant back under the Old’s law — binding Christians to commands Christ fulfilled and made obsolete (Heb 8:13). You are not at Sinai but in Christ, under grace. (This is why old-covenant requirements like the fixed tithe are not New-Covenant law — see the study on provision.)
So rest in the covenant God has made with you in Christ — not a contract you must keep to be kept, but a bond He initiated, sealed in His own blood, and swears to maintain. Receive it by faith, live as His covenant people with a yielded heart, and refuse both presumption and a return to the law. Your standing is as secure as the faithfulness of the God who cut the covenant — and He cannot deny Himself.
LUKE 22:20 · THE CUP OF THE NEW COVENANT
τοῦτο τὸ ποτήριον ἡ καινὴ διαθήκη ἐν τῷ αἵματί μου
This cup is the new covenant in My blood, which is poured out for you.
“The faithful God, who keeps covenant … to a thousand generations” (Deut 7:9). Your security rests on His covenant-keeping, not yours.
Scripture’s covenants — with Noah, Abraham, Israel at Sinai, David, and the New Covenant — unfold one redemptive plan. Sincere Christians differ on how to relate them (covenant theology, dispensationalism, and others); hold those frameworks graciously. But all agree on the heart of it: the New Covenant in Christ’s blood is the fulfillment and climax of them all, and the gospel itself.
The New Covenant is genuinely better (Heb 8:6): not “do this and live” (law) but “I will … and you shall” (grace) — God writing His law on the heart, giving His Spirit, forgiving fully. So do not drag it back under the Old Covenant’s requirements (Gal 5:1); we are not at Sinai but in Christ. And yet covenant calls for response: faith, a yielded heart, and no presuming on grace (the warnings of Hebrews). Hold both — our security is His covenant faithfulness, and the proper answer to it is wholehearted, grateful faith. (See the companion studies on grace, the Blood, Communion, and eternal security.)
A covenant with God is not a contract between equals that we negotiate or earn; it is a bond God Himself initiates, secures, and keeps. In Genesis 15, God alone passed between the pieces, taking the covenant obligation entirely on Himself while Abram slept. Our part is to receive it by faith and live as His people; the keeping of it rests on His faithfulness — “the faithful God who keeps covenant” (Deut 7:9). Your security is therefore as sure as His word and oath (Heb 6:17–18). (See the companion study on eternal security.)
The Old Covenant said, in effect, “do this and live”; it was good and holy, but conditional, and could not change the heart (Heb 7:18–19). The New Covenant says, “I will put My law within them … I will forgive … I will be their God” (Jer 31:33–34) — God doing for us and in us what we could never do for ourselves. So do not drag the New Covenant back under the Old’s law (Gal 5:1); you are not standing at Sinai but in Christ, under grace. (See the companion studies on grace and Communion.)
| Theme | Key texts |
|---|---|
| God binds Himself | Gen 12:1–3; 15:1–18; 17:1–8 |
| Sealed in blood | Exod 24:8; Matt 26:28; Heb 9:22 |
| The Old Covenant | Exod 19:5–6; Gal 3:24; Heb 7:18–19 |
| The New Covenant | Jer 31:31–34; Luke 22:20; Heb 8:6–13 |
| Everlasting, kept by God | Heb 13:20; 7:22; 9:15; Deut 7:9 |