Against the Sophists (15-16)

Formal training makes such men more skilfull and more resourceful in discovering the possibilities of a subject; for it teaches them to take from a readier source the topics which they otherwise hit upon in haphazard fashion. But it cannot fully fashion men who are without natural aptitude into good debaters or writers, although it is capable of leading them on to self-improvement and to a greater degree of intelligence on many subjects.

But I desire, now that I have gone this far, to speak more clearly on these matters. For I hold that to obtain a knowledge of the elements out of which we make and compose all discourses is not so very difficult if anyone entrusts himself, not to those who make rash promises, but to those who have some knowledge of these things. But to choose from these elements those which should be employed for each subject, to join them together, to arrange them properly, and also, not to miss what the occasion demands but appropriately to adorn the whole speech with striking thoughts and to clothe it in flowing and melodious phrase[*]—