ἃ γὰρ δεῖ μαθόντας ποιεῖν, ταῦτα ποιοῦντες μανθάνομεν → what we have to learn to do we learn by doing
subs.
P. and V. κέρας, τό. Horn for drinking: P. and V. κέρας, τό (Xen.). Musical instrument: P. and V. σάλπιγξ, ἡ; see trumpet. Made of horn, adj.: P. κεράτινος (Xen.). Lift up one's horn, met., v.: Ar. κερουτιᾶν.
