εὖ πράσσειν
From LSJ
Πρᾶττε τὰ σαυτοῦ, μὴ τὰ τῶν ἄλλων φρόνει → Tuas res age; alienas ne curaveris → Tu deine Pflicht, um die der andren sorg' dich nicht
Greek > English (Woodhouse)
be fortunate, fare well, fine conduct, flourishing, being prosperous, doing well, happiness, success