Letters 88.42

I have been speaking so far of liberal studies; but think how much superfluous and unpractical matter the philosophers contain! Of their own accord they also have descended to establishing nice divisions of syllables, to determining the true meaning of conjunctions and prepositions; they have been envious of the scholars, envious of the mathematicians. They have taken over into their own art all the superfluities of these other arts; the result is that they know more about careful speaking than about careful living.

Seneca, Letters to Lucilius 88.42, translated by Richard Mott Gummere