Quotes about anger from throughout Christian History.
Anger is foolish, fickle, and senseless. Now, of folly is begotten bitterness, and of bitterness, anger, and of anger, frenzy. This frenzy, the product of so many evils, ends in great and incurable sin. (Shepherd of Hermas. Commandment 5th. Ch. 2.)
Depart from that most wicked spirit anger, and put on patience. Resist anger and bitterness, and you will be found in company with the purity which is loved by the Lord. Take care, then, that you do not neglect by any chance this command. For if you obey this command, you will be able to keep all the other commands which I am to give you. Be strong, then, and put on power, and let all put on power who wish to walk in them. (Shepherd of Hermas. Commandment 5th. Ch. 2.)