Acts 20:28 — "The Church of God, Which He Bought With His Own Blood"

Some manuscripts read "the church of God" (theou), others "the church of the Lord" (kyriou). The major critical editions (NA28, UBS5) print theou — "church of God" — as the harder and better-attested reading, and Metzger's Textual Commentary defends it.

Either way, the sentence still says the church was bought with his own blood. If "God's church… his own blood," then God has blood — the incarnation. If "the Lord's church… his own blood," then "the Lord" (Jesus) is the one whose blood buys the church, and elsewhere in the same speech and book that Lord receives prayer (Acts 7:59) and salvation is in his name alone (Acts 4:12). Neither reading gives the objection anything.

The Greek is dia tou haimatos tou idiou. Most translations take tou idiou as an adjective — "his own blood." But a real possibility, argued by careful Trinitarian scholars (C. F. D. Moule; Murray Harris, Jesus as God, treats it as viable), is that ho idios is being used as a title of endearment — "his Own One," i.e. "his own Son" — so: "the blood of his own [Son]." Papyri from the period do use ho idios that way for close family.

The argument survives this too. On the plain reading, God is incarnate and sheds blood. On the "his own Son" reading, the church that belongs to God is bought by the blood of the Son — and the whole clause still treats God and the Son as one purchasing agent, exactly the Trinitarian pattern ("one God… and one Lord… through whom all things," 1 Corinthians 8:6). This is why the honest verdict is: Acts 20:28 is a strong witness whichever way the two questions fall, and not a verse to stake a debate on as if there were no questions.

Ignatius of Antioch, Letter to the Ephesians 1.1 (written around 110 AD, before most of the New Testament was collected): the Ephesians were "kindled into life by the blood of God (ἐν αἵματι θεοῦ)." This is not a quotation of Acts 20:28, but it is the same instinct — a bishop writing to the same city, taking it as ordinary Christian speech that the blood shed for the church is God's own. That the phrase was already unremarkable in 110 AD is strong evidence it is not a later development.

Tertullian, To His Wife 2.3: "we have been bought with a great price — and with what price? The blood of God." (Also On Modesty 6, "the blood of the Lord.")

Chrysostom, Homilies on the Acts of the Apostles 44 (on Acts 20:28): "'the Church of God, which He purchased with His own blood.' … He calls the blood His own — the blood of God — to move them the more, that they may know whose the flock is, and at what a price it was bought." Chrysostom takes the verse as read: the blood is God's.

Athanasius makes the theological grammar explicit: the blood belonged to the human flesh the Word truly assumed, and because that flesh was the Word's own, Scripture can say "the blood of God" without confusion of natures — the same logic by which it can say "the Lord of glory was crucified" (1 Corinthians 2:8).

Textual Variants in the Deity Verses — a survey of which readings the standard critical editions print, which to lean on, and which to state with a caveat.