ἢ λέγε τι σιγῆς κρεῖττον ἢ σιγὴν ἔχε → either say something better than silence or keep silence (Menander)
P. and V. εὐκοσμία, ἡ, Ar. and P. κοσμιότης, ἡ.
discipline: P. εὐταξία, ἡ.