What does the Bible say about fretting and worry?

Psalm 37:1 teaches us not to fret because of evildoers or be envious of workers of iniquity. Fretting, which can be understood as worry or anger, is a common struggle for many. The psalmist reminds us that those who seem to prosper in wickedness will ultimately face judgment, while the faithful are promised eternal life with Christ. We are urged to rely on God's promises, trusting that He will sustain us in times of trouble and anxiety, reinforcing the essence of sovereign grace theology.