A stoic quote by Epictetus from Discourses I, 18.18-19
We should discipline ourselves in small things, and from there progress to things of greater value. If you have a headache, practise not cursing. Don’t curse every time you have an earache. And I’m not saying that you can’t complain, only don’t complain with your whole being.
― Epictetus Discourses I, 18.18-19