Idiot, that’s his concern – don’t concern yourself with other people’s business. It’s his problem if he receives you badly. - Epictetus

When you are alone, you should call this tranquility and freedom and when you are with many you shouldn’t call this a crowd, or trouble or uneasiness but festival and company and contentedly accept it.

if you suppose any of the things not in our own control to be either good or evil, when you are disappointed of what you wish, or incur what you would avoid, you must necessarily find fault with and blame the authors. For every animal is naturally formed to fly and abhor things that appear hurtful, and the causes of them; and to pursue and admire those which appear beneficial, and the causes of them. It is impractical, then, that one who supposes himself to be hurt should be happy about the person who, he thinks, hurts him, just as it is impossible to be happy about the hurt itself. Hence,

Remember that it is not he who gives abuse or blows who affronts, but the view we take of these things as insulting. When, therefore, any one provokes you, be assured that it is your own opinion which provokes you. (20).