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
adj.
Winning the day: P. and V. κρείσσων, V. ὑπέρτερος, νικηφόρος (also Plat. but rare P.).
Rejoicing: P. and V. γεγηθώς (rare P.).
Be triumphant: use triumph, v.