τῆς Περσίδος γλώσσης ὅσα ἠδύνατο κατενόησε καὶ τῶν ἐπιτηδευμάτων τῆς χώρας
From LSJ
πρὸ συντριβῆς ἡγεῖται ὕβρις → pride goeth before destruction, pride comes before a fall, pride goes before a fall, pride goeth before a fall, pride wenteth before a fall, pride cometh before a fall, pride comes before the fall
English > Greek (Woodhouse Quotes Reversed)
he made himself acquainted with all he could of the Persian language and the customs of the country