λύπης ἰατρός ἐστιν ὁ χρηστὸς φίλος → a true friend is grief's physician, a worthy friend is a physician to your pain
ἀμφιδήριτος, -ον (Α) ἀμφιδηριῶμαιαμφίβολος, διαφιλονικούμενος.