οὐκ ἔστ' ἀκριβὲς οὐδὲν εἰς εὐανδρίαν

From LSJ

ὁ δ' εὖ ἔρδων θεοὺς ἐλπίδι κυδροτέρᾳ σαίνει κέαρ → but he who does well to the gods cheers his heart with a more glorious hope

Source

English > Greek (Woodhouse Quotes Reversed)

there is no sure mark to show true manhood