Science now confirms that hanging on to negative emotions such as jealousy, anger, regret, and hate will negatively impact our ability to learn. In fact, the longer we hold on to anti-social thoughts, or hold grudges, or feel fearful (harbor any negative emotion) the larger the two amygdalae on either side of our temples become. Eventually, if we do not let go of past wrongs, if we cannot forgive, or ask for forgiveness, but instead hold onto those grudges, then the amygdala grow larger. In time they grow so large we can no longer learn anything.
Letting go of hate and fear frees us up so we can learn, grow, and celebrate life!