The world is increasingly filled with anger, a trait that even affects God's church, as it is a common aspect of human nature. Anger, whether hidden and smoldering or explosive and visible, is among the most destructive works of the flesh, tearing at relationships and causing spiritual and physical harm. In Ephesians 4:26-27, the apostle Paul addresses this issue with four principles: 'be angry,' 'do not sin,' 'do not let the sun go down on your wrath,' and 'nor give place to the devil.' Paul commands believers to be angry in a righteous way, not as a concession to weakness, but as a duty under certain circumstances, ensuring it never becomes sinful or uncontrolled, opening no door to satan. Righteous anger is a capacity within humans to be stirred by certain injustices, and not all anger is wrong. Examples from the Old Testament show appropriate expressions of anger, such as Moses' response to Pharaoh's refusal to free the Israelites, where he simply left without immediate action. The Psalms also depict anger against the cruelty of the wicked. Jesus Christ Himself demonstrated righteous anger, as seen in Mark 3:1-5 when He looked at the Pharisees with anger while healing on the Sabbath, and in John 2 when He drove out the moneychangers from the Temple with controlled indignation directed at sin, not people. His anger was always guided by the Spirit of God, showing swiftness to hear and slowness to wrath. Paul urges believers to be angry against sin and evil, echoing the Psalmist's call to hate evil if one loves the Lord. He describes the moral indifference of the unconverted, who are past feeling and unable to react with indignation against sin. To counter this, Paul exhorts the church to stir themselves up, to feel moral indignation against iniquity, as a failure to do so signifies moral decadence and godlessness. This righteous anger, modeled by Jesus Christ and reflective of God's reaction to sin, is a necessary response in a world that often remains complacent or indifferent to pervasive immorality. However, Paul balances this command with 'do not sin,' warning against anger that is bad-tempered, irritable, easily provoked, excessive, or uncontrollable. Such expressions, marked by a lack of self-control, are sinful and differ from the deliberate, just anger of God. Righteous anger must never be personal or rooted in a fiery temperament but should always target the principle of sin and evil, as exemplified by Jesus Christ. Through the Spirit of God, believers can control and ultimately remove unrighteous anger, embracing kindness and forgiveness as God has shown through Christ's sacrifice.