“The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.”
This is he of whom I said, 'A man who comes after me has surpassed me because he was before me' — the Baptist reprises his earlier testimony, now grounded in visual recognition ("I saw"). The repetition emphasizes that words become truth through encounter; seeing Jesus confirms the prior verbal witness.