μεταδιωκτέον
From LSJ
Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη. Τὸ δὲ ἡττᾶσθαι αὐτὸν ὑφ' ἑαυτοῦ πάντων αἴσχιστόν τε ἅμα καὶ κάκιστον. → Τo conquer yourself is the first and best victory of all, while to be conquered by yourself is of all the most shameful as well as evil
English (LSJ)
A one must pursue, Pl.Ti.64b, Them.Or.22.272b.
Greek (Liddell-Scott)
μεταδιωκτέον: ῥημ. ἐπίθ., τοῦ μεταδιώκω, δεῖ μεταδιώκειν, Πλάτ. Τίμ. 64Β.