πτιστέον
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 winnow, ζειάς, σῖτον, Gp.3.7.1,8.
Greek (Liddell-Scott)
πτιστέον: ῥημ. ἐπίθ. τοῦ πτίσσω, δεῖ πτίσσειν, Γεωπ. 3. 7, 1.
