The person who hurt us may not even know how angry and bitter we feel. In fact, they may go on their merry way, completely oblivious to our feelings of resentment. They are happy. We are angry, sour, bitter. A grudge grows like cancer.
Inner resentment is a spreading cancer of the soul.
It multiplies its malignant tentacles, spreading to the deepest parts of our heart. A grudge pours its corrosive bitterness into our entire mindset. Holding a grudge will eat your insides. Eventually you will become a bitter person. All this happens because you refuse to forgive the one who hurt you.