If the end of education is to foster the love of truth, this love cannot be presupposed in the means. The means must rather be based on a resourceful pedagogical rhetoric that, knowing how initially resistant or impervious we all are to philosophic truth, necessarily makes use of motives other than love of truth and of techniques other than saying exactly what you mean. That is why, for example, the earlier, classical tradition of rationalism recognized the inescapable need to speak in philosophical poems and dialogues as well as treatises.

p. 10 - On the Pedagogical Motive for Esoteric Writing