Dia with Genitive vs Accusative (Greek)

Definition

διά (Strong's G1223) is a Greek preposition whose force is strongly shaped by the case of its complement. With the genitive, it normally marks passage, channel, agency, or means: "through, by means of, by." With the accusative, it normally marks cause, reason, basis, or interest: "because of, on account of, for the sake of."

1. Genitive: channel / agency / means / route - the complement is the route, instrument, intermediate agent, or means through which something happens.
2. Accusative: cause / reason / sake - the complement is the reason, basis, occasion, or person/thing for whose sake something happens.
3. Case is the diagnostic - English renderings overlap ("by," "through," "for"), so the Greek complement case must be checked.

Form Recognition

• Preposition: διά, often elided as δι' before a vowel; parser marks it [PREP].
• Genitive complement: the following article, noun, adjective, participle, or pronoun has a morph code with G: e.g. T-GSF, N-GSF, P-GSM.
• Accusative complement: the following article, noun, adjective, participle, or pronoun has a morph code with A: e.g. T-ASF, N-ASF, P-2AP.
• Parser search: python greek_parser.py --lemma "διά" --limit 300, then parse each verse with python greek_parser.py --verse "ROM 3:25" to identify the complement case.
• Common patterns: διά + genitive = διὰ/δι' + T-G.. / N-G.. / P-G..; διά + accusative = διὰ/δι' + T-A.. / N-A.. / P-A...

Functions with Examples

1. Genitive: Agency, Means, or Route

Reference	Greek	Complement Parsing	KJV Translation
Matt 1:22	διὰ τοῦ προφήτου	T-GSM + N-GSM	"by the prophet"
John 1:3	δι' αὐτοῦ	P-GSM	"by him"
Gal 1:1	δι' ἀνθρώπου ... διὰ Ἰησοῦ Χριστοῦ	N-GSM; N-GSM + N-GSM	"by man ... by Jesus Christ"
Matt 7:13	διὰ τῆς στενῆς πύλης	T-GSF + A-GSF + N-GSF	"in at the strait gate"

With persons, διά + genitive often marks the intermediate agent or channel. In Matt 1:22 the same clause has ὑπὸ Κυρίου ("by the Lord") and διὰ τοῦ προφήτου ("through/by the prophet"), showing the distinction between source/agent language and mediated channel. The spatial sense "through/by way of" remains visible when the complement names a route or entrance, as in Matt 7:13.

2. Genitive: Means, Instrument, or Channel

Reference	Greek	Complement Parsing	KJV Translation
Rom 3:22	διὰ πίστεως	N-GSF	"by faith"
Rom 3:24	διὰ τῆς ἀπολυτρώσεως	T-GSF + N-GSF	"through the redemption"
Rom 3:25	διὰ πίστεως	N-GSF	"through faith"

With abstract nouns, διά + genitive marks the means, mediating process, or channel. The construction itself identifies grammatical mediation; it does not by itself decide broader interpretive questions about the referent.

3. Accusative: Cause, Reason, Basis, or Sake

Reference	Greek	Complement Parsing	KJV Translation
Matt 13:21	διὰ τὸν λόγον	T-ASM + N-ASM	"because of the word"
Rom 3:25	διὰ τὴν πάρεσιν	T-ASF + N-ASF	"for the remission"
Rom 4:25	διὰ τὰ παραπτώματα	T-APN + N-APN	"for our offences"
Rom 4:25	διὰ τὴν δικαίωσιν	T-ASF + N-ASF	"for our justification"
Gal 4:13	δι' ἀσθένειαν	N-ASF	"through infirmity"

With the accusative, διά points to the reason, occasion, basis, or beneficiary-interest behind the action. This can be rendered "because of," "on account of," "for," or "for the sake of," depending on context.

Diagnostic Passage: Romans 3:25

Romans 3:25 contains both constructions:

Phrase	Case	Parser Evidence	Grammatical Function
διὰ πίστεως	Genitive	πίστεως = N-GSF	means / channel
διὰ τὴν πάρεσιν	Accusative	τὴν = T-ASF; πάρεσιν = N-ASF	reason / basis

This is a clean control example: the preposition is the same, but the complement case changes the grammatical force.

Contrast with Related Forms

Form	Main Force	Example
διά + genitive	through, by means of, by agency of, by way of	Rom 3:24 διὰ τῆς ἀπολυτρώσεως
διά + accusative	because of, on account of, for the sake of	Matt 13:21 διὰ τὸν λόγον
ὑπό + genitive	agency/source, especially with passive verbs	Matt 1:22 ὑπὸ Κυρίου
ἐκ + genitive	source, origin, out from	Rom 3:26 ἐκ πίστεως
εἰς + accusative	direction, goal, result, purpose	Rom 3:25 εἰς ἔνδειξιν

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Generated from: greek_parser.py (--lemma "διά"; --verse MAT 1:22, MAT 7:13, MAT 13:21, JHN 1:3, ROM 3:22-25, ROM 4:25, GAL 1:1, GAL 4:13) and KJV lookup. Last updated: 2026-05-15