The Bible says "Be Angry"
In studying for my Sunday School lesson, I read a verse that made me go hmmm. In Ephesians 4:26-27, it says "Be angry and do not sin. Don't let the sun go down on your anger, and don't give the Devil an opportunity". Whaaaat!!! Yes, it says "be angry". Anger is a natural emotion that God has created us with. Notice how Paul quickly follows it with "and do not sin". Although it is ok to be angry, it can quickly take hold and lead us to sin. So anger must not last long as we shouldn't let it last until the next day (don't let the sun go down on your anger) which is probably the more well-known part of this verse. If you continue being angry too long or you don't control your anger Satan can use it as an opportunity to lead us astray. So go ahead and be angry, the Bible says it is ok. : )