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
Plutarch, De virtute et vitioFrench (Bailly abrégé)
3ᵉ pl. sbj. prés. de εἰμί.
Russian (Dvoretsky)
ὦσι: 3 л. pl. praes. conjct. к εἰμί.
