Christadelphians, with their emphasis on careful exegesis and biblical scholarship, reject the Comma Johanneum as textually inauthentic. The phrase 'the Father, the Word, and the Holy Ghost, and these three are one' (1 John 5:7b-8a) is not cited as evidence for Trinitarian doctrine precisely because Christadelphian theology is non-Trinitarian. The rejection of this passage's authenticity aligns with Christadelphian biblical scholarship and their non-Trinitarian commitments.

Christadelphian exegesis of 1 John 5:7-8 focuses on the original Greek text's reference to 'the Spirit, and the water, and the blood,' which is understood as referring to witnesses to Christ's work, not as a Trinitarian formula.