Do teachers hold that it is their thoughts that are perceived and grasped rather than the very disciplines they take themselves to pass on by speaking? After all, who is so foolishly curious as to send his son to school to learn what the teacher thinks? When the teachers have explained by means of words all the disciplines they profess to teach, even the disciplines of virtue and of wisdom, then those who are called 'students' consider within themselves whether truths have been stated. They do so by looking upon the inner Truth, according to their abilities. That is therefore the point at which they learn.
[Augustine in the De Magistro, from Against the Academicians and The Teacher, King, tr., Hackett (Indianapolis: 1995) p. 145.]