I never work better than when I am inspired by anger; for when I am angry, I can write, pray, and preach well, for then my whole temperament is quickened, my understanding sharpened, and all mundane vexations and temptations depart.
The first thing to understand about anger is that it isn’t always a bad thing. Many people, especially Christians, have the mistaken notion that anger is intrinsically evil. As a result, they feel needless guilt. The idea that a Christian is never allowed to be angry is a demonic myth that tends to produce neurotic anxiety. I’ve had to struggle with this myth nearly all my life.
– R.C. Sproul
Righteous anger is not selfish and does not center on the pain you currently feel. To be free of sin such anger must be zealous for truth and purity, with the glory of God its chief objective.
– Oswald Sanders
Anger itself is not sinful; every emotion is from God and is good when biblically appropriate. But, “Do not let the sun go down on your anger,” Paul says (Eph. 4:26).
Jay E. Adams
Controlled anger against sin and genuine love may dwell in the same heart at the same time and be directed toward the same person. It is legitimate for us to be angry with our children over genuine disobedience. At the same time, we must not express that anger in sinful ways (yelling, screaming, nastiness, irritation, etc.) but in loving ways for the good of our children.
Wayne A. Mack