Premanand Maharaj Ji
Why do I feel enmity toward someone who insults or criticises me?
Insult breeds new sanskar
Dislike and enmity (raag-dvesh) keep the unwise caught. Without spiritual strength we cannot bear insult, and our opposition becomes a new sanskar (deep mental impression) whose result we must then live out.
If we cannot bear it, a fire arises in the heart, and we use whatever strength we have to begin opposing. That opposition becomes a new sanskar.