For contrast...
In this manner ought every one chiefly to train himself. When you go out in the morning, examine whomsoever you see or hear; and answer as if to a question. What have you seen? A handsome person. Apply the rule. Is this a thing controllable by Will or uncontrollable? Uncontrollable. Then discard it. What have you seen? One in agony for the death of a child. Apply the rule. Death is inevitable. Banish this despair, then.
This is an interesting dialogue in Epictetus, too:
Epictetus, Discourses, book 3, Concerning a certain governor who was an epicurean.