John has been introduced in verse 6 ("a man sent from God") and his witness, known already by the reader, has already been recalled: "This is the One I told you about".
Johannes on esitelty jakeessa 6 ("mies Jumalan lähettämä") ja hänen todistajansa, jo lukijan tuntema, on jo palautettu mieleen: "Tämä on se, josta kerroin sinulle".