And he entered again into the synagogue; and there was a man there which had a withered hand. And they watched him, whether he would heal him on the sabbath day; that they might accuse him. And he saith unto the man which had the withered hand, Stand forth. And he saith unto them, Is it lawful to do good on the sabbath days, or to do evil? to save life, or to kill? But they held their peace. And when he had looked round about on them with anger, being grieved for the hardness of their hearts, he saith unto the man, Stretch forth thine hand. And he stretched [it] out: and his hand was restored whole as the other. Mark 3:1-5
This passage says that Jesus looked on them with anger. Why do people say it is a sin to be angry? I have found nowhere in the Bible where it says such a thing. Anger has its place. Ephesians 4: tells us we can be angry and not sin. We can even get angry at God sometimes and He does not hold it against us. In 1 Kings 19 Elijah gets so frustrated with God that he wants to die. God just thought Elijah was in a bad mood and needed rest, so he had him sleep under a juniper tree and then sent an angel to feed him when he woke up. In Jonah 4 Jonah gets mad at God but it didn’t bother God. I’m glad that we serve a God who understands when we get angry.