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Grammar Analysis: John 5:17–18 (Co-Action with the Father; ison theō)

Overview

Two verses that function as a single exegetical unit: v.17 records Jesus' claim of co-acting continuity with the Father (present indicatives of ἐργάζομαι in parallel), and v.18 records the narrator's own interpretation of that claim — that Jesus was "making himself equal with God" (ἴσον ἑαυτὸν ποιῶν τῷ Θεῷ). The grammatical question is whether the evangelist endorses this interpretation as the true sense of Jesus' words, or merely reports it as the (mistaken) Jewish inference. The morphology of v.18 — the participle poiōn attached to Jesus as subject, the conjunction pattern οὐ μόνον ... ἀλλὰ καὶ, and the predicate adjective ἴσον in agreement with ἑαυτὸν — all point to authorial endorsement: John is telling us what Jesus was in fact doing, not merely what the Jews thought he was doing.

Text

Greek (v.17): ὁ δὲ ἀπεκρίνατο αὐτοῖς Ὁ Πατήρ μου ἕως ἄρτι ἐργάζεται, κἀγὼ ἐργάζομαι·

KJV (v.17): But Jesus answered them, My Father worketh hitherto, and I work.

Greek (v.18): διὰ τοῦτο οὖν μᾶλλον ἐζήτουν αὐτὸν οἱ Ἰουδαῖοι ἀποκτεῖναι, ὅτι οὐ μόνον ἔλυεν τὸ σάββατον, ἀλλὰ καὶ Πατέρα ἴδιον ἔλεγεν τὸν Θεόν, ἴσον ἑαυτὸν ποιῶν τῷ Θεῷ.

KJV (v.18): Therefore the Jews sought the more to kill him, because he not only had broken the sabbath, but said also that God was his Father, making himself equal with God.

Word-by-Word Parsing

v.17

# Word Lemma Strong's Parsing Gloss
1 ὁ ὁ G3588 T-NSM the (he)
2 δὲ δέ G1161 CONJ but/and
3 ἀπεκρίνατο ἀποκρίνομαι G611 V-ADI-3S (Aor Mid Ind) answered
4 αὐτοῖς αὐτός G846 P-DPM them (dat)
5 Ὁ ὁ G3588 T-NSM the
6 Πατήρ πατήρ G3962 N-NSM Father
7 μου ἐγώ G1473 P-1GS of me (my)
8 ἕως ἕως G2193 ADV until
9 ἄρτι ἄρτι G737 ADV now
10 ἐργάζεται ἐργάζομαι G2038 V-PNI-3S (Pres M/P Ind) is working
11 κἀγὼ κἀγώ G2504 P-1NS-K (crasis καί+ἐγώ) and I
12 ἐργάζομαι ἐργάζομαι G2038 V-PNI-1S (Pres M/P Ind) am working

v.18

# Word Lemma Strong's Parsing Gloss
1 διὰ διά G1223 PREP because of
2 τοῦτο οὗτος G3778 D-ASN this
3 οὖν οὖν G3767 CONJ therefore
4 μᾶλλον μᾶλλον G3123 ADV all the more
5 ἐζήτουν ζητέω G2212 V-IAI-3P (Impf Act Ind) were seeking
6 αὐτὸν αὐτός G846 P-ASM him
7 οἱ ὁ G3588 T-NPM the
8 Ἰουδαῖοι Ἰουδαῖος G2453 A-NPM Jews
9 ἀποκτεῖναι ἀποκτείνω G615 V-AAN (Aor Act Inf) to kill
10 ὅτι ὅτι G3754 CONJ because
11 οὐ μόνον οὐ / μόνος G3756/G3440 PRT-N / ADV not only
12 ἔλυεν λύω G3089 V-IAI-3S (Impf Act Ind) was breaking/loosing
13 τὸ σάββατον σάββατον G4521 T-ASN / N-ASN the sabbath
14 ἀλλὰ καὶ ἀλλά / καί G235/G2532 CONJ / CONJ but also
15 Πατέρα πατήρ G3962 N-ASM Father
16 ἴδιον ἴδιος G2398 A-ASM his own (emphatic)
17 ἔλεγεν λέγω G3004 V-IAI-3S (Impf Act Ind) was calling/saying
18 τὸν Θεόν θεός G2316 T-ASM / N-ASM God (acc)
19 ἴσον ἴσος G2470 A-ASM equal
20 ἑαυτὸν ἑαυτοῦ G1438 F-3ASM (reflexive) himself
21 ποιῶν ποιέω G4160 V-PAP-NSM (Pres Act Ptcp) making
22 τῷ Θεῷ θεός G2316 T-DSM / N-DSM to God (dat)

Key Grammatical Features

1. ἐργάζεται ... ἐργάζομαι — Parallel Present Middle/Passive Indicatives (co-action)

  • Form: Both verbs are Present Middle/Passive Indicative of the same lexeme ἐργάζομαι ("to work, labor, carry out"), 3rd singular for the Father (ἐργάζεται) and 1st singular for the Son (ἐργάζομαι). The lexeme is a deponent middle — middle in form, active in sense. The two verbs are juxtaposed with the crasis κἀγώ ("and I") as the only connective, producing a tight parallelism: the Father works — and-I work.
  • Significance:
  • The present tense presents the action as ongoing/durative. Coupled with the adverbial phrase ἕως ἄρτι ("until now"), it asserts a continuous activity from an unstated past up to the present moment. The adverbial phrase belongs grammatically to the Father's clause, but the parallel construction propagates its force to the Son's clause.
  • No conjunction of subordination between the two verbs — no "because" or "as" or "in the same way that." The Son does not say "because my Father works, I also am permitted to work." He sets his work alongside the Father's as a single ongoing enterprise, using the same verb in the same tense/voice, differing only in person.
  • This is a grammatical claim of co-action: the Father and the Son are, at the present speech-moment, engaged in the same verb. The sabbath-healing is not Jesus acting on delegated authority while the Father rests; it is the Son joining the Father in a work the Father himself has never ceased to do.
  • Grammar reference: Greek present indicative is the default for describing continuous/habitual action; the rhetorical weight here is carried by the parallelism + ἕως ἄρτι, not by any unusual morphology.

2. Πατέρα ἴδιον ἔλεγεν τὸν Θεόν — "He was calling God his own Father" (idios, emphatic)

  • Form: Double-accusative construction with λέγω ("to say, call X to be Y"). Πατέρα (acc predicate, "Father") and τὸν Θεόν (acc of the direct object, "God," articular) frame the sentence, with the attributive adjective ἴδιον ("his own") fronted before its noun Πατέρα for emphasis. ἔλεγεν is imperfect active — "was [habitually/repeatedly] calling."
  • Significance:
  • ἴδιος is not a possessive pronoun (μου would be the ordinary possessive "my"). It is an emphatic adjective meaning "one's own, peculiar to, properly one's own," marking a relation not shared by others. Every Jew could call God "our Father" (Isa 63:16, Mal 2:10) in a covenantal sense; ἴδιος explicitly excludes the shared/covenantal sense and asserts a Father-Son relation proper to Jesus alone.
  • This is the first element of the narrator's two-clause interpretation: (a) calling God "his own Father" in a unique sense, and (b) making himself equal with God. The second clause explicates the first.
  • The imperfect ἔλεγεν ("was calling") generalizes — this is not a single outburst but Jesus' customary speech-pattern.

3. ἴσον ἑαυτὸν ποιῶν τῷ Θεῷ — Predicate-Adjective + Reflexive + Participle + Dative of Reference

  • Form: A present active participle ποιῶν (nom sg masc, agreeing with the implicit subject "he" = Jesus, attached to ἔλεγεν as an attendant circumstance) governs a double-accusative construction: ἑαυτὸν (reflexive accusative, "himself") is the object, and ἴσον (masculine accusative singular, agreeing with ἑαυτὸν) is the predicate adjective. The dative τῷ Θεῷ is a dative of reference/comparison ("equal with respect to God / equal to God") — ἴσος routinely takes the dative to express the second term of the equality.
  • Significance:
  • ἴσος in ancient Greek denotes equality of measure, number, or standing — not analogy, not likeness of character, but parity. In Phil 2:6 the same word is used (τὸ εἶναι ἴσα θεῷ) of Christ's prior equality with God. The lexical choice is decisive: the Jews did not merely hear "likeness" or "resemblance" but equality of status.
  • The present participle ποιῶν ("making") is imperfective — it describes Jesus' calling-God-his-own-Father as an ongoing act of self-equation. It is grammatically dependent on ἔλεγεν and stands in apposition of manner/explanation: the saying is itself the making. To call God "his own Father" in the ἴδιος sense is to make oneself equal with God; the participle does not add a second offense but interprets the first.
  • The reflexive ἑαυτὸν puts the action squarely on Jesus: he is the one equating himself with God. This rules out any reading in which the Jews alone are doing the equating as a false inference — the grammar locates the equating in the subject of ἔλεγεν, which is Jesus.

4. οὐ μόνον ... ἀλλὰ καὶ — Narrator's Escalating Conjunction Pair

  • Form: The correlative pair οὐ μόνον ... ἀλλὰ καὶ ("not only ... but also") is a standard Greek construction for cumulative intensification. Both members are assertions; the second is presented as weightier than the first.
  • Significance:
  • Both members are in the narrator's voice, introduced by the causal ὅτι ("because"), which reports the reason for the Jews' murderous intensification (ἐζήτουν ... ἀποκτεῖναι). The narrator lists two things Jesus did: (a) was breaking the sabbath (ἔλυεν τὸ σάββατον, imperfect — habitual/iterative), and (b) was calling God his own Father, thereby making himself equal with God.
  • The grammar does not distinguish the epistemic status of the two clauses. The sabbath-breaking is presented as an objective fact in the narrator's voice (ἔλυεν); the self-equation is presented in the same voice, in the same construction, with the same epistemic weight. Whatever John grants to (a) he grants to (b). If John is endorsing the sabbath claim as factual (which he is — ἔλυεν is his own verb), he is equally endorsing the equal-with-God claim as factual.
  • The ἀλλὰ καὶ ("but also") signals that (b) is the graver offense in the Jews' eyes — and the narrator builds to it as the climax. This is not a bracket around a misunderstanding; it is the authorial punch-line.

5. Why This Is Authorial, Not Misreported

Three grammatical arguments converge:

  1. Parallel predicate structure with ἔλυεν. If John wanted to distance himself from the ἴσον θεῷ claim, he would use a construction that signals reported belief (e.g., ἐνόμιζον ὅτι ... — "they thought that"; or a ὡς-clause of alleged reason). Instead he uses the same ὅτι-construction with the same imperfective indicatives that he uses to report the factual sabbath-breaking. The syntax treats (a) and (b) as parallel facts.
  2. The participle ποιῶν is attached to Jesus, not to the Jews. Greek participles take their subject from the governing verb. ἔλεγεν has Jesus as subject; ποιῶν inherits that subject. The grammar says Jesus was making himself equal with God — the Jews are not the subject of ποιῶν. A misreading-narrative would require the Jews to be the makers ("they were treating him as equal with God, falsely"); the Greek does not allow that reading.
  3. The ἴδιος/ἴσος gloss is John's, not the Jews' reported speech. John does not write "they said he said..." (which would push the equation into reported speech with uncertain epistemic status). He writes directly: he was calling God his own Father, making himself equal with God. This is the narrator's clarification of what Jesus meant in v.17 — exactly the interpretive move John makes elsewhere (cf. John 2:21, "he spoke of the temple of his body"; John 7:39, "this he spake of the Spirit"; John 12:33, "this he said, signifying what death he should die"). John is an interpreting evangelist, and v.18 is his interpretation.

The overall effect: v.18 is John's gloss on v.17. Jesus said, "My Father works, and I work"; John tells us what that sentence meant — that Jesus was calling God his own Father in a unique sense and thereby claiming parity with God. The Jews understood correctly; they simply refused to believe it.

Clause Structure

v.17 (simple answering formula + two-clause speech): - Matrix: ὁ δὲ ἀπεκρίνατο αὐτοῖς (aorist middle — the "answer" as a single completed response) - Direct speech, clause 1: Ὁ Πατήρ μου ἕως ἄρτι ἐργάζεται (present indicative, durative + temporal adverb) - Direct speech, clause 2: κἀγὼ ἐργάζομαι (present indicative, parallel form with crasis — no subordinating conjunction)

v.18 (causal-explanatory reporting): - Matrix: διὰ τοῦτο οὖν μᾶλλον ἐζήτουν αὐτὸν οἱ Ἰουδαῖοι ἀποκτεῖναι (imperfect + epexegetic aorist infinitive — were seeking ... to kill) - Reason clause: ὅτι + coordinated imperfects οὐ μόνον ἔλυεν ... ἀλλὰ καὶ ... ἔλεγεν - Participial explanation (attributive-circumstantial to ἔλεγεν): ἴσον ἑαυτὸν ποιῶν τῷ Θεῷ

The two-tier structure of v.18 (indicative ἔλεγεν + dependent participle ποιῶν) is the key: the participle grammatically explains what the main verb was doing. "Calling God his own Father" and "making himself equal with God" are not two separate offenses but a single offense described twice — the second phrase interpreting the first.

Cross-References

Grammar library

Word studies

  • G2316 theos — the noun used twice in v.18 (acc + dat) and governing the ἴσον predicate
  • G4160 poieō — the participle ποιῶν here carries the technical "make X to be Y" double-accusative construction
  • jhn-2-1-11 — John's characteristic narrator-commentary ("this beginning of signs ... manifested his glory") — same evangelist's interpretive voice
  • Philippians 2:6 — τὸ εἶναι ἴσα θεῷ, the same lexeme ἴσος used of Christ's pre-incarnate equality with God
  • John 10:30–33 — second instance of the same pattern: Jesus speaks (ἐγὼ καὶ ὁ Πατὴρ ἕν ἐσμεν), Jews infer blasphemy (σὺ ἄνθρωπος ὢν ποιεῖς σεαυτὸν θεόν — same ποιέω + reflexive construction), and John reports it as the correct reading of Jesus' claim