1 John 5:7-8 — "The Comma Johanneum"

The Plymouth Brethren recognize that the Comma Johanneum (1 John 5:7-8—"there are three that bear record in heaven") is a late interpolation into the text of 1 John, likely added in medieval manuscripts to strengthen Trinitarian polemic. The Brethren do not treat this passage as original Scripture, and serious biblical scholarship within their ranks acknowledges its disputed textual status. However, they do not shrink from the passage's doctrinal claim, because the substance of Trinitarian truth is abundantly testified elsewhere in Scripture—in John 1:1, Matthew 28:19, and throughout the New Testament affirming Father, Son, and Spirit as three coequal persons in one Godhead.

This nuanced position demonstrates Brethren confidence in the sufficiency of Scripture without requiring every verse to be equally ancient or unquestionable. The Trinity is not hung on a single textual thread; rather, Brethren theologians have argued that even if the Comma Johanneum is excised, the doctrine remains unshaken. J.N. Darby and other Brethren commentators noted that relying on disputed texts for cardinal doctrines weakens faith and opens the door to skepticism, whereas anchoring belief in the unanimous witness of the canonical core fortifies confidence. The Brethren thus reject the Comma as original but affirm its theological substance as derivative from clearer scriptural grounds.