According to Osho, anger that flares when you’re insulted is a natural energy, but it isn’t caused by the other; it arises from your own ego and unconsciousness. The insulter doesn’t truly harm you—he harms himself—unless you identify and react. Simply watch the heat of anger without suppressing or expressing it, and the energy transforms into clarity, leaving you untouched.
When someone insults you, your anger is your own heat—just notice it without attacking or hiding, and it cools down by itself.