Notes on The Apocalypse of St. John the Apostle (Author Bishop Richard Challoner (ed.))
3:14 The Amen,: that is, the true one, the Truth itself; the Word and Son of God. The beginning. . .that is, the principle, the source, and the efficient cause of the whole creation.
Original Douay-Rheims from Project Gutenberg - Massive cleanup of OCR problems and editing done locally.