Jonah 4:9 NKJV
Then God said to Jonah, “Is it right for you to be angry about the plant?” And he said, “It is right for me to be angry, even to death!”
Anger is not always or necessarily sinful, but it has such a tendency to run wild that whenever it displays itself, we should be quick to question its character, with this enquiry, “Doest thou well to be angry?” It may be that we can answer, “YES.” Very frequently anger is the madman’s firebrand, but sometimes it is Elijah’s fire from heaven. We do well when we are angry with sin, because of the wrong which it commits against our good and gracious God; or with ourselves because we remain so foolish after so much divine instruction; or with others when the sole cause of anger is the evil which they do. He who is not angry at transgression becomes a partaker in it. Sin is a loathsome and hateful thing, and no renewed heart can patiently endure it. God himself is angry with the wicked every day, and it is written in His Word, “Ye that love the Lord, hate evil.” Far more frequently it is to be feared that our anger is not commendable or even justifiable, and then we must answer, “NO.” Why should we be fretful with children, passionate with servants, and wrathful with companions? Is such anger honourable to our Christian profession, or glorifying to God? Is it not the old evil heart seeking to gain dominion, and should we not resist it with all the might of our newborn nature. Many professors give way to temper as though it were useless to attempt resistance; but let the believer remember that he must be a conqueror in every point, or else he cannot be crowned. If we cannot control our tempers, what has grace done for us? Some one told Mr. Jay that grace was often grafted on a crab-stump. “Yes,” said he, “but the fruit will not be crabs.” We must not make natural infirmity an excuse for sin, but we must fly to the cross and pray the Lord to crucify our tempers, and renew us in gentleness and meekness after His own image.
By : Charles Spurgeon
Ephesians 4:26-27, 31-32 NKJV
“Be angry, and do not sin”: do not let the sun go down on your wrath,  nor give place to the devil.  Let all bitterness, wrath, anger, clamor, and evil speaking be put away from you, with all malice.  And be kind to one another, tenderhearted, forgiving one another, even as God in Christ forgave you.