Independent Fundamental Churches that use the King James Version or follow the Textus Receptus tradition affirm 1 John 5:7 as including the Comma Johanneum. The extended phrase about the Trinity—'the Father, the Word, and the Holy Ghost'—is understood as authentic Scripture and as a clear biblical witness to the Trinity. While textual scholars debate the manuscript evidence, fundamentalist churches receive this verse as Scripture based on the Received Text tradition.

The Comma Johanneum is valued as an explicit biblical affirmation of Trinitarian doctrine, and its presence in the KJV adds authority to the church's theological position. The verse is taught and cited as direct Scripture support for the classical doctrine of the Trinity.