If it costs you your peace, it's too expensive. - Nassim Nicholas Taleb

Envy, like thirst for revenge, is the wicked person's version of our natural sense of injustice.

So you become numb to insults, particularly if you teach yourself to imagine that the person uttering them is a variant of a noisy ape with little personal control. Just keep your composure, smile, focus on analyzing the speaker not the message, and you’ll win the argument. An ad hominem attack against an intellectual, not against an idea, is highly flattering. It indicates that the person does not have anything intelligent to say about your message. The psychologist

It is the appearance of inconsistency, and not its absence, that makes people attractive.