Many there are that suffer the sun not only to go down upon their anger, but to run his whole race— yes, many races—ere they can be reconciled, whereby their anger becomes inveterate and turns into malice, for anger and malice differ but in age.
Anger is a tender virtue and such as by reason of our unskillfulness may be easily corrupted and made dangerous. He that in his anger would not sin must not be angry at anything but sin.
Thou a Christian and carry hellfire about thee! How can it be? When we see a child furious and revengeful who comes of merciful parents, we…say we wonder of whom he got his currish, churlish disposition; his father and mother were not so. Who learns thee, O Christian, to be so revengeful and unmerciful? Thou hast it not of thy heavenly Father, I am sure.Gems, 19
there is a holy kind of anger, which the scripture does not disallow; so that, unless a man is angry in that way, he will never be a good and godly man. For a good man has a zeal for God, and in that godly zeal he is angry at the iniquity and naughtiness of mankind.The Decades https://www.monergism.com/decades-ebook