The three swaps of Romans

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Word Study

ἀλλάσσω / μεταλλάσσω

The three swaps — Romans 1:21–28

One darkened heart. Three exchanges. Three times God handed them over.

Paul’s indictment in Romans 1 runs on one Greek verb family — ἀλλάσσω and its compound μεταλλάσσω — used three times. The same trade is named first in simple form, then twice in the intensified form, moving from glory to truth to the body’s use. Behind all three stands the heart in v.21. Beside the three trades stands another spine: παρέδωκεν, “he handed them over,” in vv.24, 26, and 28.

The root — wrong believing (v.21)

“Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.”

This is not ignorance. They knew God. They would not honor him as God. What follows is downstream of that refusal. The first swap is that darkened heart given content.

1. The glory swap (v.23) — ἤλλαξαν

“And changed the glory of the uncorruptible God into an image made like to corruptible man, and to birds, and fourfooted beasts, and creeping things.”

Traded away: the glory (δόξα) of the incorruptible God.

Traded for: an image (εἰκών) of corruptible creatures, listed downward — man, birds, four-footed beasts, creeping things — Genesis creation order run backward.

Verb: ἤλλαξαν, simple aorist of ἀλλάσσω. This is v.21’s vain reasoning made concrete. Who God is gets exchanged for a likeness.

2. The truth swap (v.25) — μετήλλαξαν

“Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen.”

Traded away: the truth (ἀλήθεια) of God.

Traded for: the lie (τὸ ψεῦδος) — the article marks one archetypal falsehood, not a pile of mistakes.

Wordplay: κτίσις (creature) against κτίσαντα (Creator) — one root, opposite ends.

Verb: μετήλλαξαν, the compound. Hinge: διό in v.24 (“wherefore”) hangs on the block of vv.22–23. God handed them over because of that glory-for-image trade. Worship then follows the new belief: the creature is served above the Creator.

3. The nature swap (v.26) — μετήλλαξαν again

“For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature.”

Traded away: the natural use (τὴν φυσικὴν χρῆσιν).

Traded for: that which is against nature (τὴν παρὰ φύσιν).

Same verb as v.25. Most English hides the match by rendering v.25 “changed” and v.26 “did change,” as if a new subject had begun. Paul has not changed subjects. διὰ τοῦτο (“for this cause”) opens a second handing-over from the same root. The body now enacts the exchange. χρῆσις here is the noun already treated in the word study on chrēsis.

The shape

One root (v.21) — they knew God and would not glorify him as God.

Three named swaps — glory (ἤλλαξαν, v.23), truth (μετήλλαξαν, v.25), natural use (μετήλλαξαν, v.26).

Three handings-over (παρέδωκεν) — v.24 uncleanness, v.26 vile affections, v.28 a reprobate mind. The third is not a fourth swap. It is the mind left to the fruit of the first trade.

So the unit is not three unrelated failures set side by side. It is one refusal to honor God, given a likeness in v.23, then allowed to run into worship and into the body. The compound verb in vv.25 and 26 is how Paul says those two moves are the same exchange, carried further.

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