διαθήκη (diathēkē)
diathēkē
covenant
Quick Reference
- Language
- Koine Greek
- Testament
- New Testament
- Occurrences
- 30 verses
- Root
- —
Word Overview
The Greek noun diathēkē carries a dual sense that bridges legal and relational realms. In classical usage and papyri, it denotes a will or testament—a unilateral disposition of property that takes effect only after death. This meaning appears in passages like Galatians 3:15 and Hebrews 9:16–17, where the author argues that a will cannot be enforced while the testator is still alive.
However, when translating the Hebrew Bible’s berith into Greek, the Septuagint used diathēkē to mean covenant. This choice likely reflected a desire to emphasize God’s sovereign authority; while the word synthēkē implies an agreement between equals, diathēkē suggests a arrangement established by one party for another. Consequently, it describes God’s binding promises to humanity, such as the Abrahamic covenant referenced in Acts 3:25 or the new covenant instituted at the Last Supper (Matthew 26:28).
The tension between these two meanings—will and covenant—is central to New Testament theology. The word captures a relationship that is not negotiated but graciously given, yet it remains as legally binding as any ancient testament. This unique semantic range allows Scripture to present God’s promises as both a gift of grace and an unbreakable legal reality.
Based on public-domain lexicons (Strong's, Thayer, Gesenius, Brown-Driver-Briggs and others).
What This Word Means for Your Faith
The word diathēkē carries a weighty dual meaning that bridges legal certainty and relational intimacy. In ancient contexts, it could refer to a will that only takes effect after death, or a solemn covenant established by one party for another. When Scripture uses this term, it highlights that God’s promises are not negotiated agreements between equals, but gracious gifts initiated by Him alone. This means your standing before God rests on His faithful character rather than your own fluctuating performance.
Consider the New Covenant instituted by Jesus at the Last Supper. He described His blood as the seal of this new arrangement, poured out for the forgiveness of sins. Unlike the old covenant which relied on external laws that often led to failure, this new reality is written on the heart through the Spirit. It offers a relationship defined by internal transformation and divine grace.
This assurance provides deep comfort in uncertain times. You can rest knowing that the One who establishes these covenants remains faithful even when circumstances shift. The promises secured through Christ’s sacrifice are unbreakable, offering hope that transcends human weakness and legal technicalities.
How it's translated
How this word is rendered word-by-word in the 30 verses where it appears, by frequency.
- covenant17×
- of a covenant2×
- covenants2×
- covenant,2×
- a covenant2×
- [the] covenant2×
- of [the] covenant1×
- covenants,1×
- covenant;1×
- [there is] a will,1×
- [The] covenant1×
- A will1×
Forms in the text
The inflected forms of this word as they appear in Scripture, by frequency.
- διαθήκης14×
- διαθήκην5×
- διαθήκη5×
- διαθήκῃ2×
- διαθήκη,2×
- διαθῆκαι,1×
- διαθῆκαι1×
- διαθήκης·1×
- διαθήκης,1×
- διαθηκῶν1×
Key Verses
-
Matthew 26:28
for this is my blood of the new covenant, which is poured out for many for the remission of sins.
This verse identifies Jesus’ sacrificial death as the foundational act that establishes the New Covenant, linking forgiveness directly to His blood.
-
II Corinthians 3:6
who also made us sufficient as servants of a new covenant, not of the letter but of the Spirit. For the letter kills, but the Spirit gives life.
Paul contrasts the old system with the new, emphasizing that the Spirit gives life rather than external rules leading to condemnation.
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Hebrews 8:10
“For this is the covenant that I will make with the house of Israel after those days,” says the Lord: “I will put my laws into their mind; I will also write them on their heart. I will be their God, and they will be my people.
This passage quotes God’s promise to internalize His laws, marking a shift from external compliance to heart-level transformation.