Be, don't tell

Marcus Aurelius, Louvre Museum
CC BY 2.5 via Wikimedia Commons

A good mentor is the model, not the pointer

"Never call yourself a philosopher, nor talk a great deal among the unlearned about theorems, but act conformably to them. Thus, at an entertainment, don't talk how persons ought to eat, but eat as you ought.""For sheep don't throw up the grass to show the shepherds how much they have eaten; but, inwardly digesting their food, they outwardly produce wool and milk. Thus, therefore, do you likewise not show theorems to the unlearned, but the actions produced by them after they have been digested."

Epictetus, The Enchiridion"

"Waste no more time arguing about what a good man should be. Be one."

Marcus Aurelius, Meditations 10.16