anger is meanness and bad character. this is because anger is the result of something that goes against what the soul desires. if someone above a person does something that goes against what he desires he will turn a blind eye and call that sadness. if someone below him does it the meanness of the soul and bad character will lead him to indulge in anger and to be able and willing to do violence.
والغضب فإنه لؤم وسوء مقدرة؛ وذاك أن الغضب ثمرة لخلاف ما تهوى النفس، فإن جاء الإنسان خلاف ما يهوى ممن فوقه أغضى وسمى ذلك حزنا، وإن جاءه ذلك ممن دونه حمله لؤم النفس وسوء الطباع على الاستطالة بالغضب، والمقدرة والبسطة على البطش.