WELS receives 1 John 5:7-8 as canonical Scripture even while acknowledging the textual-critical questions about its origin and authenticity. The passage's explicit trinitarian formula is valued in WELS tradition, though WELS doctrine on the Trinity is firmly established in other biblical passages (Matthew 28:19, 2 Corinthians 13:14) and in the ecumenical creeds. WELS Bibles include the passage with appropriate textual notation.

WELS strict confessional subscription affirms the Trinity as taught in Scripture and the Book of Concord; 1 John 5:7-8 is part of the received biblical canon for the church's use, even if its textual authenticity is uncertain. The passage's content is wholly consistent with biblical and confessional teaching.