It takes away the sting and makes it less painful and less important. It is a sound psychological fact that we learn from being criticized. Critical remarks make us stop and consider our ways. The important thing is not to be too stubborn to learn from criticism. Resentment also arises when one sees others who seem to have so much more than he does.
Many times have little feeling and thoughts of resentment end up in some overt violent action.
This is attested to every day in the news reports of violence of one kind or another. For many years, a friend practiced as a private duty nurse and specialized in geriatrics. Once she was called to attend a dear lady in a denominational retirement home infirmary. She was amazed to find how many were freely expressing their deep resentments toward family members, staff, and even God Himself. Many who had been practicing Christians in their young years were not bitter, miserable oldsters.