Exploring the Meaning of Diatheke in Greek

διαθήκη (Diatheke) means “covenant.” In the passages below it appears both for God’s covenant dealings with his people and for the “new covenant” named by Jesus in connection with his blood and the forgiveness of sins.

Occurrences

Matthew 26:28: “for this is my blood of the new covenant, which is poured out for many for the remission of sins.”

Here διαθήκη frames Jesus’ death as covenantal: the “new covenant” is explicitly linked to “my blood,” and its effect is described as being “poured out for many for the remission of sins.” The word gathers together sacrifice (“blood … poured out”), beneficiaries (“for many”), and outcome (“remission of sins”) into a single covenant statement.

Mark 14:24: “He said to them, “This is my blood of the new covenant, which is poured out for many.”

Mark’s wording matches the covenant identification (“my blood of the new covenant”) and again highlights the pouring out “for many.” In this scene, διαθήκη functions as the interpretive label for what the blood signifies, presenting the act as the establishment or enactment of a covenant for others.

Luke 1:72: “to show mercy toward our fathers, to remember his holy covenant,”

In Zechariah’s praise, διαθήκη appears as something God “remembers,” and it is called “holy.” The covenant is tied to “mercy toward our fathers,” so the word contributes the idea of a binding divine commitment whose remembrance is an expression of mercy across generations.

Luke 22:20: “Likewise, he took the cup after supper, saying, “This cup is the new covenant in my blood, which is poured out for you.”

Luke presents the covenant in a concrete object: “This cup is the new covenant in my blood.” διαθήκη here is not merely announced but pointed to through the cup, and the beneficiaries are made personal—“poured out for you.” The covenant is thus anchored in a shared meal setting and directed toward the hearers.

Acts 3:25: “You are the children of the prophets, and of the covenant which God made with our fathers, saying to Abraham, ‘All the families of the earth will be blessed through your offspring.’”

Peter uses διαθήκη to define identity and inheritance: his hearers are “children … of the covenant.” The covenant is explicitly described as something God “made with our fathers,” and it is attached to a spoken promise to Abraham about blessing “all the families of the earth.” In this proclamation, the word marks continuity with the patriarchal promise and positions the audience inside its scope.

Acts 7:8: “He gave him the covenant of circumcision. So Abraham became the father of Isaac, and circumcised him the eighth day. Isaac became the father of Jacob, and Jacob became the father of the twelve patriarchs.”

Stephen’s summary names a specific covenant expression: “the covenant of circumcision.” διαθήκη is presented as something God “gave,” and it is immediately connected to an embodied practice carried out in Abraham’s family line (“circumcised him the eighth day”), then traced through successive generations. The word here emphasizes covenant as a transmitted, defining commitment that shapes a people’s story.

Romans 9:4: “who are Israelites; whose is the adoption, the glory, the covenants, the giving of the law, the service, and the promises;”

Paul uses the plural, “the covenants,” placing διαθήκη among the distinctive privileges that belong to Israelites. In this catalog, the word functions as a category of divine gifts alongside adoption, glory, law, worship (“the service”), and promises, stressing covenant as part of Israel’s corporate heritage.

Romans 11:27: “This is my covenant with them, when I will take away their sins.”

διαθήκη is presented as God’s declared covenant “with them,” and its content is framed by a future moment: “when I will take away their sins.” In this line, the word carries the force of a solemn divine commitment whose stated outcome is the removal of sins, connecting covenant to forgiveness in a direct way.

1 Corinthians 11:25: “In the same way he also took the cup, after supper, saying, “This cup is the new covenant in my blood. Do this, as often as you drink, in memory of me.”

Paul repeats the cup saying with an added instruction. διαθήκη again is located “in my blood,” with the cup serving as the covenant’s tangible referent. The command “Do this … in memory of me” shows how the covenant confession shapes ongoing communal practice: the repeated drinking is tied to remembrance, and the covenant language provides the meaning of the act.

2 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.”

Here διαθήκη defines a ministry: Paul and his coworkers are “servants of a new covenant.” The verse contrasts “letter” and “Spirit,” and the covenant is characterized in those terms—“not of the letter, but of the Spirit.” The word thus serves as a heading for a particular mode of service, with the accompanying contrast explaining the kind of life-giving work the covenant entails.

2 Corinthians 3:14: “But their minds were hardened, for until this very day at the reading of the old covenant the same veil remains, because in Christ it passes away.”

διαθήκη appears as “the old covenant,” associated with “the reading” and a continuing “veil.” In this setting, the word marks a recognized covenantal order that can be read publicly yet remain obscured to some (“their minds were hardened”). The statement “because in Christ it passes away” connects the removal of the veil to Christ, while the covenant term provides the framework for describing what is being read and what is being surpassed.

Galatians 3:15: “Brothers, speaking of human terms, though it is only a man’s covenant, yet when it has been confirmed, no one makes it void or adds to it.”

Paul appeals to everyday experience: “a man’s covenant.” διαθήκη here is used as an analogy emphasizing confirmatory finality—once “confirmed,” it cannot be nullified or modified (“no one makes it void or adds to it”). The word contributes the idea of an established covenant as something with recognized standing and stability in ordinary human dealings, which Paul leverages for his argument in context.

Sense and Usage

Across these occurrences, διαθήκη operates as a key term for binding divine commitments and their defining signs. In Luke 1:72 it is “his holy covenant,” remembered as an expression of mercy. In Acts 3:25 it is the covenant “which God made with our fathers,” voiced as a promise that reaches outward to “all the families of the earth,” and in Acts 7:8 it is a covenant “of circumcision,” tied to a concrete practice that marks Abraham’s descendants.

The word also supports a plural perspective in Romans 9:4—“the covenants”—where covenant is not a single, isolated idea but part of a set of gifts and privileges. That plural mention stands alongside Romans 11:27, where covenant is presented as God’s own declaration connected to taking away sins, showing how covenant speech can name both relationship (“with them”) and outcome (“take away their sins”).

In the Synoptic Last Supper sayings (Matthew 26:28; Mark 14:24; Luke 22:20) and Paul’s rehearsal of the same tradition (1 Corinthians 11:25), διαθήκη is joined to the language of blood and the cup. The covenant is “new,” it is located “in my blood,” and it is paired with “poured out” imagery. Matthew makes explicit the covenant’s stated effect, “for the remission of sins,” while Luke’s “for you” and Mark’s and Matthew’s “for many” highlight the covenant’s beneficiaries. In 1 Corinthians 11:25 the covenant confession becomes part of repeated practice (“as often as you drink”), so covenant is not only a theological label but also a formative phrase spoken over a communal action.

In 2 Corinthians 3, διαθήκη functions as a way to distinguish modes of ministry and perception: “servants of a new covenant” are contrasted with “the reading of the old covenant,” and the contrast is sharpened through “letter” and “Spirit,” “kills” and “gives life,” “veil remains” and “it passes away.” Without changing the core sense of covenant, these verses show how the term can carry layered associations—public reading, comprehension or hardness, service, and the kind of life that is produced.

Imagery

Several passages attach vivid, repeated images to διαθήκη. The most prominent is the cup and blood language: “my blood of the new covenant” (Matthew 26:28; Mark 14:24) and “This cup is the new covenant in my blood” (Luke 22:20; 1 Corinthians 11:25). Alongside it stands the motif of “remember[ing] his holy covenant” (Luke 1:72) and the public “reading of the old covenant” with a “veil” that “passes away” in Christ (2 Corinthians 3:14). Together these scenes portray covenant as something spoken, remembered, enacted in concrete signs, and read aloud—carrying both communal memory and present effect.

Sources: Lexical data from Strong’s Exhaustive Concordance and the Translators Brief Lexicon of Extended Strongs for Greek (STEPBible, CC BY). Occurrence data from the Translators Amalgamated Greek New Testament (STEPBible, CC BY). Scripture quotations from the World English Bible (public domain).