Quote by Marcus Aurelius
"If you are distressed by anything external, the pain is not due to the thing itself, but to your estimate of it; and this you have the power to revoke at any moment."
More from Marcus Aurelius
"You have power over your mind - not outside events. Realize this, and you will find strength."
"The impediment to action advances action. What stands in the way becomes the way."
"You could leave life right now. Let that determine what you do and say and think."
"Waste no more time arguing what a good man should be. Be one."