οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
firmemente
ἑδραίως: ἐπίρρ. στερεῶς, ἰσχυρῶς, ἐπιμόνως, Ἡρωδιαν. 3. 14, 10 κλ.
