The verse is a parenthetical ground (γάρ) inserted into the long sentence that runs from v. 6 through v. 10. Paul has just reported what the Jerusalem leaders saw (ἰδόντες, v. 7): that he had been entrusted with the gospel of the uncircumcision as Peter with that of the circumcision. Verse 8 supplies the warrant for that perception — one and the same unnamed agent worked effectively in both men.

The sentence is built on a single repeated verb. ἐνεργήσας (participle) and ἐνήργησεν (finite) are the same lexeme deployed twice, and the symmetry is total: one agent, two datives, two εἰς-phrases. Nothing in the clause distinguishes the two commissions except their spheres. That is the argument — and it is made by syntax, not by assertion.

Two deliberate reticences must survive translation. First, the subject is never named: Paul writes only ὁ … ἐνεργήσας. Second, the second limb of the comparison is elliptical — there is no noun answering ἀποστολήν on Paul’s side, only εἰς τὰ ἔθνη. Both gaps have been filled in by scribes, versions, and translators ever since; neither should be filled in here.

Note also the switch of name. Verse 7 and v. 8 have Πέτρος; vv. 9, 11, 14 have Κηφᾶς. Paul’s normal usage throughout Galatians and 1 Corinthians is Cephas, which makes the Πέτρος of vv. 7–8 one of the strongest pieces of evidence that these two verses reproduce, or echo, language formulated at Jerusalem.

The glossary fixes ἐνεργέω as work (effectively) / produce — BDAG’s “bring about through use of capability, effect.” In Paul it is near-technical for supernatural agency, divine or hostile (1 Cor 12:6, 11; Gal 3:5; Eph 1:11, 20; Phil 2:13; Col 1:29; 1 Thess 2:13; 2 Thess 2:7), and the noun ἐνέργεια belongs to the same family (Eph 1:19; Col 2:12). The corpus policy excludes all energy-derivatives, which import a modern impersonal-force concept (§9), and requires one English root wherever the verb recurs — which here means at both points in a single clause.

That requirement is the whole point. Paul could have varied his verb and did not. The participle and the indicative are the same word, and an English rendering that reads “the one who was at work in Peter … was also at work in me” preserves what “the one who empowered Peter … likewise made me an apostle” destroys. The repetition is the parity claim.

The aorists are complexive: the commissioning viewed as a single completed act, not a process or a continuing endowment. Rendering with an English past (“worked”) rather than a perfect or progressive keeps this visible.

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The construction is ἐνεργέω + bare dative + εἰς + accusative, and the dative’s function is genuinely open. Three classifications have serious support:

• Dative of advantage — “worked for Peter,” i.e. on his behalf, toward his commission. This is the least committal reading and matches εἰς as naming the end to which the working tended.
• Dative of sphere / locative — “worked in Peter,” the man as the field of the divine operation. This matches Pauline usage elsewhere where ἐνεργέω takes ἐν + dative explicitly (Eph 1:20; 2:2; Phil 2:13; Col 1:29), and Koine freely drops the preposition.
• Quasi-instrumental — “worked through Peter,” the man as the means by which the mission was carried out. Attested as a Koine extension, but it would normally require διά, and it shifts the claim from what God did to Peter to what God did by him.

The choice matters because it determines whether the verse is about the conferral of two commissions or about the conduct of two missions. The reading text uses “in,” which in English hospitably covers sphere and leaves advantage audible, while blocking the instrumental reading least defensibly supported by the preposition-less construction.

Note that ἐμοί is the emphatic (non-enclitic) form of the pronoun, standing at the end of its clause after adjunctive καί. The emphasis is real but modest; per corpus policy it is marked by placement rather than by added words.

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Proposed — pending reviewJ. B. Lightfoot, Saint Paul's Epistle to the Galatians, 10th ed. (London: Macmillan, 1890)

Paul writes ὁ … ἐνεργήσας — the article substantivizes the participle and the referent is left unstated. He could have written ὁ θεός in three letters and did not.

The referent is not in serious doubt: God is the standing subject of ἐνεργέω in Pauline usage with a personal agent (Phil 2:13; 1 Cor 12:6; Gal 3:5). But the withholding is a feature of the sentence, and the textual tradition records ancient discomfort with it — a number of witnesses supply θεός, a supplement that regularizes exactly where the text is spare.

The reticence has rhetorical work to do. The subject of v. 7 was the Jerusalem leaders (ἰδόντες); the subject of v. 9 will be James, Cephas, and John. Between them Paul sets an unnamed agent whose action precedes and grounds anything the pillars can see or grant. Supplying the name in the rendering does no harm doctrinally but flattens the construction, and per the standing policy on unexpressed subjects, none is supplied in the reading text.

The literal tier keeps “the [one] having worked effectively,” displaying the article; smooth registers may resolve to a relative clause with the compression recorded.

ἀποστολή is the abstract noun to ἀπόστολος: the office or commission, not the person and not the activity in the abstract. Four NT occurrences (Acts 1:25; Rom 1:5; 1 Cor 9:2; Gal 2:8).

Render apostleship, keeping the same English root as ἀπόστολος (already fixed: apostle where the sender is Christ or God, envoy where a congregation’s genitive qualifies it). Here the governing genitive τῆς περιτομῆς names not a sender but a sphere, so the titular sense stands.

Excluded: mission (modern ecclesiastical-institutional register, and it converts an office into a programme), ministry (that is διακονία, a distinct lexeme Paul had available), apostolic office (expands a single noun into a phrase and retrojects later usage).

The noun is anarthrous: an apostleship, not the apostleship. The indefinite article should stand in English — Paul is not naming a single defined institution with two branches but attributing to Peter a commission of this kind.

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The glossary fixes περιτομή as circumcision, retained even where the abstract noun stands by metonymy for the circumcised (Rom 3:30; Gal 2:7-9), because the abstract-for-concrete idiom is the same construction Paul parodies with κατατομή at Phil 3:2.

So here: τῆς περιτομῆς is not “the circumcision party” and not “the Jews.” It is the abstraction standing for a people, and the English must keep it that way — both because the parallel abstraction ἀκροβυστία in v. 7 depends on it, and because per §5 the identification of the group is a flashpoint better carried in a note than resolved by a rendering.

The genitive is one of sphere or objective reference: an apostleship directed to the circumcised. Not possessive (“the apostleship belonging to the circumcision”), which would make the office the property of the group rather than its service.

Note the asymmetry with v. 7: there Paul paired τὸ εὐαγγέλιον τῆς ἀκροβυστίας with τῆς περιτομῆς, two matched abstractions. Here only περιτομῆς appears, answered not by ἀκροβυστίας but by τὰ ἔθνη. The switch of vocabulary across one sentence is itself data and should be recorded rather than levelled.

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The glossary fixes ἔθνη as the nations in the literal tier and Gentiles in smooth registers — the LXX equivalent of גּוֹיִם, marking outsiders to the covenant people rather than an ethnic grouping, and never pagans or heathen (§5, §9).

Two features are worth noting here. First, the shift of register: Paul answers an abstraction (περιτομή) with a concrete plural (ἔθνη), which breaks the symmetry his sentence otherwise maintains so rigorously. Whether this is stylistic variation or a deliberate widening — from a defined people to the nations at large — cannot be settled, but the English must not repair it by rendering ἔθνη as “the uncircumcision.”

Second, the articular form τὰ ἔθνη is anaphoric to the ἀκροβυστία of v. 7 and to the ἔθνεσιν of v. 2. Retain the article.

At Gal 1:16 and 2:2 Paul used ἐν + dative with this noun (locative-distributive, among the nations); here he uses εἰς + accusative, which is directional. The switch is recorded, not levelled.

The two εἰς-phrases are the hinge of the verse’s rhetoric, and they are not parallel.

The first governs an abstract noun naming an office: εἰς ἀποστολὴν τῆς περιτομῆς. The second governs a concrete plural naming a people: εἰς τὰ ἔθνη. On Peter’s side the goal of the divine working is a commission; on Paul’s side it is simply the nations, with no noun answering ἀποστολήν at all.

The ellipsis is the single most discussed feature of the verse.

The reading text supplies nothing. “Worked also in me for the nations” leaves the gap where Paul left it; the study tier may bracket a supplement. Rendering “made me an apostle to the Gentiles” imports a noun from the first limb and converts a verb of operation into one of appointment — two separate losses in one phrase.

On the force of εἰς itself: goal and result are both live, as the glossary already allows for εἰς + acc in telic constructions. Plain English for carries both.

Proposed — pending reviewHans Dieter Betz, Galatians: A Commentary on Paul's Letter to the Churches in Galatia, Hermeneia (Philadelphia: Fortress, 1979)

γάρ is postpositive and grounds what precedes. Per §10 it is always rendered — the argument structure of epistolary material is load-bearing, and dropping the particle (as readable modern versions often do here) severs v. 8 from the ἰδόντες of v. 7.

The question is what it grounds. Two constructions of the sentence are available:

1. Parenthetical. Verse 8 is an aside within the sentence begun at v. 6, explaining what gave the pillars grounds for the perception reported in v. 7. The main line then resumes with καὶ γνόντες in v. 9. NA28’s punctuation (commas, no full stops around v. 8) supports this, and the resumptive participle γνόντες in v. 9, parallel to ἰδόντες in v. 7, confirms it.

2. Directly subordinate to v. 7. Verse 8 states the ground of the seeing itself, with v. 9 continuing the same participial chain.

The difference is slight in sense but affects punctuation. Either way, no English sentence should be closed at the end of v. 7 or v. 8 — the whole of vv. 6–10 is one sentence in Greek, and the modern verse divisions must not be allowed to break it.

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The καί before ἐμοί is adjunctive, not a connective. Per the standing corpus policy on adjunctive καί (before prepositional phrases, demonstratives, participles, inside ἵνα clauses, in the apodosis of a condition), it must always be rendered also.

This is not a stylistic nicety. The entire force of the verse rests on this one particle: it adds Paul to a party already named and asserts that the same agent did the same thing. Rendering “and in me” makes the clause a list; rendering “so also in me” over-specifies with an inferential marker Paul did not write. Plain also, attached to the pronoun, is correct.

The word order — καὶ ἐμοί, with the emphatic pronoun following — places the stress exactly where the argument needs it.

Galatians uses Κηφᾶς at 1:18; 2:9, 11, 14, and Πέτρος only at 2:7 and 2:8. The glossary fixes Κηφᾶς as Cephas and forbids substituting Peter, precisely because Paul’s distribution is data.

The concentration of the Greek name in two verses, together with the unusual vocabulary of those verses (πεπίστευμαι, ἀκροβυστία as an abstraction for a people, ἀποστολή), has long been taken as evidence that vv. 7–8 reproduce or echo a formulation originating at Jerusalem — a recognition-statement Paul is citing rather than composing. The argument is cumulative and not demonstrative, but the lexical facts that support it are plain and must not be hidden by harmonizing the names.

A small body of witnesses reads Κηφᾷ here, levelling toward the surrounding usage; this is secondary normalization in the direction the whole tradition tends. NA28 prints Πέτρῳ.

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Proposed — pending reviewF. F. Bruce, The Epistle to the Galatians: A Commentary on the Greek Text, NIGTC (Grand Rapids: Eerdmans, 1982)

The verse is textually stable in its main lines, with three points worth recording.

The supplied subject. A number of witnesses add ὁ θεός after ἐνεργήσας or as subject of ἐνήργησεν, supplying the agent Paul leaves unnamed. This is clarification in the direction of the obvious and is secondary; the harder, shorter reading stands. The variation is itself evidence that ancient readers felt the reticence.

Πέτρῳ / Κηφᾷ. A minority read Κηφᾷ, assimilating to the name used in vv. 9, 11, 14. Secondary.

The second ἐνήργησεν. Some witnesses vary the second verb or its form; the repetition of an identical lexeme within one short clause is exactly the kind of thing scribes smooth, and the direction of change is away from the repetition, not toward it. Retain both occurrences identical.

NA28 prints the text as given, with no bracketed material.

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The patristic reading of the verse is strikingly consistent on the parity point and divided on the ellipsis.

Chrysostom treats the repeated verb as the proof of equality: the same power operated in both, and the difference is one of assigned field, not of rank. He reads the second limb as carrying over ἀποστολήν — Paul is named apostle to the Gentiles by implication, and does not need to say so because the grammar says it.

Jerome, commenting on Galatians, likewise takes the division as one of sphere and not of dignity, and notes that Paul’s deliberate avoidance of the word apostle for himself in this clause is modesty rather than concession.

Theodoret and the Greek catena tradition press the single subject: one God, one working, two fields.

The verse later became a standing text in debates over Petrine primacy — read by one side as granting Peter a defined and prior commission, by the other as the clearest NT statement that the two apostolates were coordinate. Both readings are reception, not evidence, and neither may shape the rendering (§11). What the Greek asserts is that one agent produced both, and it asserts it by saying the same word twice.

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Proposed — pending reviewJohn Chrysostom, Commentary on Galatians, in Nicene and Post-Nicene Fathers, First Series, vol. 13 (Edinburgh: T&T Clark, 1889) · Jerome, Commentary on Galatians, trans. Andrew Cain, Fathers of the Church 121 (Washington, DC: Catholic University of America Press, 2010)

The Vulgate reads: qui enim operatus est Petro in apostolatum circumcisionis operatus est et mihi inter gentes. Three things to note. The repeated operatus est preserves the Greek repetition exactly — Latin is a better guide here than most English versions. Petro keeps the bare dative, leaving its function as open in Latin as in Greek. But inter gentes (“among the nations”) renders εἰς with a preposition of location rather than direction, which quietly flattens the parallel with in apostolatum and tips the second limb toward describing a field of labor rather than a goal.

The Peshitta supplies the divine subject and, in places, fills out the second limb, in the same direction as the Greek witnesses that add ὁ θεός. This is translational completion, not textual evidence.

The cumulative lesson is that the two features most needing protection in English — the unnamed subject and the unfilled ellipsis — are precisely the two that the versional tradition has been filling in since antiquity.

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