Notes on The First Epistle of St. John the Apostle (Author Bishop Richard Challoner (ed.))
5:20 And may be in his true Son: He is, or this is the true God, and life eternal. Which words are a clear proof of Christ's divinity, and as such made use of by the ancient fathers.
Original Douay-Rheims from Project Gutenberg - Massive cleanup of OCR problems and editing done locally.