Is all anger sin? No, but some of it is. Even God Himself has righteous anger against sin, injustice, rebellion and pettiness. Anger sometimes serves a useful purpose, so it isn't necessarily always a sin. Obviously, we’re going to have adverse feelings, or God wouldn’t have needed to provide the fruit of self-control.
Just being tempted to do something is not sin. It's when you don't resist the temptation, but do it anyway, that it becomes sin. God sometimes allows us to feel anger so we’ll recognize when we’re being mistreated.
But even when we experience true injustices in our lives, we must not vent our anger in an improper way. We must guard against allowing anger to drag us into sin. Ephesians 4:26,27 tells us, When angry, do not sin; do not ever let your wrath (your exasperation, your fury or indignation) last until the sun goes down. Leave no [such] room or foothold for the devil [give no opportunity to him]. Refuse to give the devil any opportunity to get a foothold in your life through anger.
All anger, regardless of its cause, has the same effect on our lives. It upsets us, causing us to feel pressure.
Keeping anger locked inside and pretending it doesn't exist can even be dangerous to our health. Most of the time we’re only hurting ourselves, and the person who angered us isn’t even aware of it. So we must take responsibility for our anger and learn to deal with it.
Process it and bring closure to it, and that will relieve the pressure. I have been through some rough times in my life, and for many years those experiences caused me to feel miserable. I was so mad about the abuse in my childhood that it was making me bitter and hateful.
I was angry with everybody, but one day God confronted me and said, “Joyce, are you going to let that make you bitter or better?" That got my attention, and I eventually had to find a positive way to process my anger. That was a place of new beginnings for me.
When you face your anger and decide to deal with it God's way, you can overcome it. The Holy Spirit gives us the power to be stable and walk in the fruit of the Spirit.
We have the power to forgive those who do injustices in our lives and to love the unlovely. .