We aren't filled with fear except by things that are bad; and not by them, either, as long as it is in our power to avoid them. - Epictetus

Don’t seek for everything to happen as you wish it would, but rather wish that everything happens as it actually will — then your life will flow well.

When any person does ill by you, or speaks ill of you, remember that he acts or speaks from an impression that it is right for him to do so. Now it is not possible that he should follow what appears right to you, but only what appears so to himself. Therefore, if he judges from false appearances, he is the person hurt, since he, too, is the person deceived. For if anyone takes a true proposition to be false, the proposition is not hurt, but only the man is deceived. Setting out, then, from these principles, you will meekly bear with a person who reviles you, for you will say upon every occasion, “It seemed so to him.

Whenever someone helps or hinders you, or praises or criticizes you, remember that they see you only through the lens of their own impressions. If they act or speak from a warped perspective, they hurt themselves — not you.