"Be ye angry, and sin not: let not the sun go down upon your wrath:" (Ephesians 4: 26)
In the above verse, "anger" and "wrath" are two different words. There are times when we should get angry. There is nothing wrong with expecting people to behave themselves, and there is also nothing wrong with getting angry when people are not behaving themselves in a right spirit.
Jesus did get angry, as recorded in the Bible, one time:
"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: 5)
The lack of grace grieved Jesus greatly. He also upbraided these Pharisees before all when they put the law ahead of grace:
"The Lord then answered him, and said, Thou hypocrite, doth not each one of you on the sabbath loose his ox or his ass from the stall, and lead him away to watering? 16And ought not this woman, being a daughter of Abraham, whom Satan hath bound, lo, these eighteen years, be loosed from this bond on the sabbath day? 17And when he had said these things, all his adversaries were ashamed: and all the people rejoiced for all the glorious things that were done by him." (Luke 13: 15-17)
For many of us, though, we believed that if we got angry, we had to struggle our way out of it in order to get right with God again.
It's time for us to put away the traditions of men, and stop believing the lies of broken Pharisees looking to force a yoke a bondage on the sons of God, who have received a new spirit.
"3Blessed be the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessings in heavenly places in Christ: 4According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love: 5Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will, 6To the praise of the glory of his grace, wherein he hath made us accepted in the beloved." (Ephesians 1: 3-6)
We have already been blessed. We have already been accepted in Christ Jesus, the Beloved Son of God.
What are we worried about?
If we get angry, let us rest in the truth that the blood of Jesus cleanses (present tense) us from all sins (1 John 1:7).
God is not dependent or contingent on our moods, people! Let us never forget the promise in Isaiah, fulfilled by Jesus at the Cross:
"8In a little wrath I hid my face from thee for a moment; but with everlasting kindness will I have mercy on thee, saith the LORD thy Redeemer.
9For this is as the waters of Noah unto me: for as I have sworn that the waters of Noah should no more go over the earth; so have I sworn that I would not be wroth with thee, nor rebuke thee." (Isaiah 54:8-9)
Even if we get angry, we can rest in the gracious truth that God our Daddy will never get angry with us again for our sins.