οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
mŏnŏmĕter: tra, trum, adj., = μονόμετρος,I consisting of one metre, monometer, Prisc. Metr. Ter. p. 1320 P.