And I hold that no man has treated mankind worse than he who has studied philosophy as if it were some marketable trade, who lives in a different manner from that which he advises.
For those who are liable to every fault which they castigate advertise themselves as patterns of useless training.
Book: Moral Letters Vol III
Subtitle: Seneca's timeless letters of advice and wisdom.
Author: Seneca
Chapter: On the approaches to philosophy
Location: Chapter 108, Section 36
Content:
36.
And I hold that no man has treated mankind worse than he who has studied philosophy as if it were some marketable trade, who lives in a different manner from that which he advises.
For those who are liable to every fault which they castigate advertise themselves as patterns of useless training.