Letters 108.23

Attalus used to recommend a pillow which did not give in to the body; and now, old as I am, I use one so hard that it leaves no trace after pressure. I have mentioned all this in order to show you how zealous neophytes are with regard to their first impulses towards the highest ideals, provided that some one does his part in exhorting them and in kindling their ardour. There are indeed mistakes made, through the fault of our advisers, who teach us how to debate and not how to live; there are also mistakes made by the pupils, who come to their teachers to develop, not their souls, but their wits. Thus the study of wisdom has become the study of words.

Seneca, Letters to Lucilius 108.23, translated by Richard Mott Gummere