Anger is always accompanied by other sins. Anger promotes the sins of gossip, self-righteous judging, maligning, revenge, complaining, bitterness, and many others. Lack of growth means lack of joy, lack of love, lack of divine viewpoint. Anger promotes jealousy and cruelty. Anger causes misery for loved ones, friends, and community.
Anger destroys a nation.
Other Bible Teaching on Anger Eph. This verse is quoted from Psalm 4, which is about David's righteous indignation at the revolt of his son Absalom. He is resisting the temptation to become angry. Tremble with anger, yet do not sin. He was tempted to become angry at Absalom because Abaslom had used his position to start a revolution against his father.