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
unlimited: P. ἄμετρος.
unrestrained: P. and V. ἀνειμένος.
free: P. and V. ἐλεύθερος.
