distinguish between your own and not your own, the things which are in your power and not in your power, - Epictetus

[Epictetus] believes that God gave man the means to fulfill all his obligations; that these means are within his power, that happiness is attained through what we are capable of, this being the reason God gave them to us. Our mind cannot be forced to believe what is false, nor our will compelled to love something that makes it unhappy. These two powers are therefore free, and it is through them that we can become perfect.

On the occasion of every accident (event) that befalls you, remember to turn to yourself and inquire what power you have for turning it to use. If you see a fair man or a fair woman, you will find that the power to resist is temperance (continence). If labor (pain) be presented to you, you will find that it is endurance. If it be abusive words, you will find it to be patience. And if you have been thus formed to the (proper) habit, the appearances will not carry you along with them.

When you do anything from a clear judgment that it ought to be done, never shun the being seen to do it, even though the world should make a wrong supposition about it; for, if you don’t act right, shun the action itself; but, if you do, why are you afraid of those who censure you wrongly?