beginning from the baptism of John, unto the day that he was received up from us, of these must one become a witness with us of his resurrection.

Starting from the baptism of John till he went up from us, one will have to be a witness with us of his coming back from death.

αρχισας απο του βαπτισματος του Ιωαννου εως της ημερας καθ' ην ανεληφθη αφ' ημων, εις εκ τουτων να γεινη μεθ' ημων μαρτυς της αναστασεως αυτου.

Beginning from the baptism of John, unto that same day that he was taken up from us, must one be ordained to be a witness with us of his resurrection.