The angry person should think about himself during moments of anger:
If the angry person could see himself in the mirror when he is angry, he would hate himself and the way he looks. If he could see the way he changes, and the way his body and limbs shake, how his eyes glare and how out of control and crazy his behaviour is, he would despise himself and be revolted by his own appearance. It is well-known that inner ugliness is even worse than outer ugliness; how happy the Shaytan must be when a person is in this state! We seek refuge with Allah from the Shaytan and from failure.