Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
Τιτᾱνες the Titans. 1 λῦσε δὲ Ζεὺς ἄφθιτος Τιτᾶνας (P. 4.291)
