Epictetus, Golden Sayings 120

Does a Philosopher apply to people to come and hear him? Does he not rather, of his own nature, attract those that will be benefited by him—like the sun that warms, the food that sustains them? 

What Physician applies to men to come and be healed? (Though indeed I hear that the Physicians at Rome do nowadays apply for patients—in my time they were applied to.) 

"I apply to you to come and hear that you are in an evil case; that what deserves your attention most is the last thing to gain it; that you know not good from evil, and are in short a hapless wretch."

A fine way to apply! Though unless the words of the Philosopher affect you thus, speaker and speech are alike dead.