There are temperaments with regard to which a man is forbidden to follow the middle path. He should move away from one extreme and adopt the other.
Among these is arrogance. If a man is only humble, he is not following a good path. Rather, he must hold himself lowly and his spirit very unassuming. That is why Numbers 12:3 describes our teacher Moses as "very humble" and not simply "humble". Therefore, our Sages directed: "Hold oneself very, very lowly." Also, they declared: "Whoever is arrogant is as if he denied God's presence, as implied by Deuteronomy 8:14: 'And your heart will be haughty and you will forget God, your Lord.' Furthermore, they said: "Whoever is arrogant should be placed under a ban of ostracism. This applies even if he is only somewhat arrogant."
Anger is also an exceptionally bad quality. It is fitting and proper that one move away from it and adopt the opposite extreme. He should school himself not to become angry even when it is fitting to be angry. If he should wish to arouse fear in his children and household - or within the community, if he is a communal leader - and wishes to be angry at them to motivate them to return to the proper path, he should present an angry front to them to punish them, but he should be inwardly calm. He should be like one who acts out the part of an angry man in his wrath, but is not himself angry.
The early Sages said: Anyone who becomes angry is like one who worships idols. They also said: Whenever one becomes angry, if he is a wise man, his wisdom leaves him; if he is a prophet, his prophecy leaves him. The life of the irate is not true life.
Therefore, they have directed that one distance himself from anger and accustom himself not to feel any reaction, even to things which provoke anger. This is the good path.
This is the way of the righteous: They accept humiliation, but do not humiliate others; they listen when they are shamed, but they do not answer; they do this with love and are joyous in their sufferings. Of them, Judges 5:31 states: "And those who love Him are like the sun when it comes out in its strength."