Remember, it is not enough to be hit or insulted to be harmed, you must believe that you are being harmed. If someone succeeds in provoking you, realize that your mind is complicit in the provocation. Which is why it is essential that we not respond impulsively to impressions; take a moment before reacting, and you will find it easier to maintain control.
Epictetus, The Art of Living: The Classical Manual on Virtue, Happiness and Effectiveness
philosophy, self-control, stoic, stoicism