We might expect the Bible to say all anger is sin, but not only does it not say that, such an oversimplification causes us to puzzle or even take offense when the Bible records the sinless Son of God getting angry and the Father himself exploding in anger.

Just as it is not a sin for two teenagers to be madly in love, but it could easily lead to sexual sin, so anger is not sin, but it could easily lead to sin. Strong passions in weak people are so morally dangerous that they are often best avoided. This does not mean the passions themselves are wrong but, like alcoholic intoxication, they can lower self-control and make it harder for the average person to avoid sin.

Tragically, we humans are so corrupt that most of us have little conception of love, let alone righteous anger. Selfish love is as impossible as hateful love and yet when couples say they are in love, they are usually referring not to love but to selfishness. They mean they are excited about how much they think the person could give them, not how much they long to lay down their lives for that person. Anger fired by selfishness is hideously different to anger fired by selflessness (genuine love) and nurtured by self-control.

Taken from Why God’s Anger is Comforting

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