Epictetus Enchiridion 1: Some things are within our power, while others are not.
Calm isn’t the absence of chaos, but mastery over it.
Adversity is the Stoic’s gym.
Even oaks need forests.
Knowledge without action is a ship without oars.
It’s not the blow that hurts, but your resistance to falling.
Marcus Aurelius Meditations 2.11: You could leave life right now. Let that determine what you do and say.