The ancient rabbis were astute psychologists. They reflected on the inner life, not through theories, but through narratives, especially their analyses of and speculations on the narratives in the Torah.
It happens to all of us. You are with friends, engaged in small talk, and then someone makes a disparaging comment about a common acquaintance. You didn't see the insult coming, but there it is. It's entered the conversation.
What should you do? Should you challenge the slight or let it go by unaddressed?