But be not ye called Rabbi (humeis de mē klēthēte Rabbei). An apparent aside to the disciples. Note the emphatic position of hūmeis. Some even regard Mat 23:8-10 as a later addition and not part of this address to the Pharisees, but the apostles were present. Euthymius Zigabenus says: “Do not seek to be called (ingressive aorist subjunctive), if others call you this it will not be your fault.” This is not far from the Master’s meaning. Rabbi means “my great one,” “my Master,” apparently a comparatively new title in Christ’s time.