9. τὰ αὐτὰ ποιεῖτε. τὸ αὐτὸ φρονεῖν is fairly frequent in St Paul Rom 12:16; Rom 15:5; 2Co 13:11; Php 2:2; Php 4:2; cf. 1Co 12:25. There seems no other instance of ποιεῖν, but the meaning is clear, ‘Act on the same principles in recognition of the same fundamental verities.’ The combination with πρὸς is also unique and is best explained on the analogy of Mat 13:56; 1Co 2:3; Joh 1:1 = ‘In intercourse with.’
ἀνιέντες τὴν ἀπειλήν. The tongue is a real source of danger to the master. The servant cannot answer back, and the master may be betrayed into acts of cruelty to save his own consistency; cf. with Wetstein