According to Osho, the way to deal with anger, sadness, or jealousy without hurting others or repressing them is meditation: become a silent, nonjudgmental watcher of the mind. Disidentify from thoughts and feelings, let them be without feeding them. As watchfulness grows, these emotions lose energy and dissolve; action then arises from clarity and silence, not from reactive compulsion.
Sit quietly and watch your feelings like clouds passing by, without judging or acting on them; when you stop feeding them, they fade and you can respond kindly.