Ameer al-Momineen (a.s) said: "Being good-tempered is the best form of goodness."
Imam Sadiq (a.s): "Being good-tempered is a part of religion."
Imam Sadiq (a.s) Said: "There is nothing better than being good-tempered."
Imam Sadiq (a.s): "Being good-tempered will increase your share of daily bread."
Imam Sadiq (a.s) : "One can recognize the perfection of a Muslim's religion by his not talking in vain, not quarrelling, being patient and being good-tempered."
Imam Baqir (a.s) quoted on the authority of God's Prophet (a.s): "A man's manliness depends on his temper."
Imam Sadiq (a.s) quoted on the authority of God's Prophet (a.s): "A man's prosperity depends on his being good-tempered."