οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
πεινᾶντι: дор. (= πεινῶντι) dat. part. praes. к πεινάω.
