διά

Meaning:

Through

Because

On account of

Preposition that relates to movement through space, time, means or cause.

When used with the genitive case, διά emphasizes the means or channel by which something happens.

When used with the accusative case, διά emphasizes the reason or cause behind something that happens.

Meaning by case

Case governed	Basic meaning	Expanded sense	Example (Greek)	Translation
Genitive	through, by means of	Instrumental or agency — through, by, by means of	δι’ αὐτοῦ ἐγένετο πάντα ()	“All things were made through him.”
Accusative	because of, on account of	Causal — because of, for the sake of	διὰ τὴν ἀνομίαν ()	“Because of lawlessness.”

Theological Significance

In the New Testament, διά often highlights agency or intermediacy, especially in divine action:

Theological Theme	Phrase	Meaning
Creation through Christ	πάντα δι’ αὐτοῦ ἐγένετο ()	Salvation through Jesus Christ
Faith as means	δικαίωσις διὰ πίστεως ()	Justification through faith
Grace as channel	χάρις διὰ Ἰησοῦ Χριστοῦ ()	Grace came through Jesus Christ

This shows διά’s central role in expressing mediation - everything God does, He does through someone or something.