Temperament has a great deal to do with our religious views and with the emphases we lay on spiritual matters generally… The Scriptures, critical self-discipline, honesty of heart, and increased trust in the inward operations of the Holy Spirit will save us from being too greatly influenced by temperament. (A. W. Tozer)

A man of knowledge uses words with restraint, and a man of understanding is even-tempered (Proverbs 17:27).
A patient man has great understanding, but a quick tempered man displays folly (Proverbs 14:29).
A wise man fears the Lord and shuns evil, but a fool is hot-tempered and reckless (Proverbs V 14:16).
A fool gives full vent to his anger, but a wise man keeps himself under control (Proverbs 29:11).
A quick-tempered man does foolish things and a crafty man is hated (Proverbs 17:17).
A hot-tempered man stirs up dissension… (Proverbs 15:18)
An angry man stirs up dissension, and a hot-tempered one commits many sins (Proverbs 29:22).
A hot-tempered man must pay the penalty… (Proverbs 19:19)
Do not make friends with a hot-tempered man; do not associate with one easily angered, for you may learn his ways and get yourself ensnared (Proverbs 22:24-25).
Better to live in a desert than with a quarrelsome and ill-tempered wife (Proverbs 21:19).
Better a man who controls his temper than one who takes a city (Proverbs 16:32).
All kinds of animals, birds, reptiles and creatures of the sea are being tamed and have been tamed by man. But no man can tame the tongue! It is a restless evil, full of deadly poison. (James 3:7-8)