what does the bible say?
Ephesians 4:26–27 warns against harboring anger, as it provides an inroad for the devil. This Ephesian passage is one of many in the Bible that teaches against acting on and fostering anger because it leads to sin. In Genesis, God admonishes Cain for his anger and warns him against falling into sin (Genesis 4:6–7). Cain doesn’t heed that warning, which leads to him murdering his own brother (Genesis 4:8). The book of Proverbs associates anger with foolishness and warns of the harmful consequences of angry words and actions (Proverbs 16:32; 29:11; 29:22). The New Testament communicates similar warnings. Jesus taught about the sinfulness of anger and the importance of resolving disputes (Matthew 5:21–24). Many of the New Testament epistles advise believers not to harbor anger (Ephesians 4:26–27; Colossians 3:8; James 1:19–20). These warnings must be distinguished from what the Bible presents as justified anger—i.e., God’s wrath toward sin (Exodus 32:9–10) and Jesus’s concern with God’s holiness (John 2:15–16). Those exceptions aside, the Bible teaches us to avoid acting on our anger. By keeping our focus on Christ, we can avoid allowing anger to take root and grow into sin (Colossians 3:1–2).