Within our control are our own opinions, aspirations, and desires and the demons that distract us from these goals. Outside of our control are such things as what kind of body we have, whether or not we are born into wealth, and how we are regarded by others.
EpictetusSurvey and test a prospective action before undertaking it. Before you proceed, step back and look at the big picture, lest you act rashly on raw impulse.
EpictetusIf you want to improve, be content to be thought foolish and stupid with regard to external things. Don't wish to be thought to know anything; and even if you appear to be somebody important to others, distrust yourself. For, it is difficult to both keep your faculty of choice in a state conformable to nature, and at the same time acquire external things. But while you are careful about the one, you must of necessity neglect the other
Epictetus