αὐτάρκης ἔσῃ, ἂν μάθῃς τί τὸ καλὸν κἀγαθόν ἐστι → you will be contented with your lot if you learn what the honourable and good is
P. στεγανός, V. στεγνός (Euripides, Cyclops 324).
be waterproof, v.: P. and V. στέγειν.
