What does the Bible say about God's anger and sin?

Psalm 38 reveals the anguish of a man who feels the weight of God's anger due to his sin. The psalmist cries out, expressing how his iniquities press heavily upon him and cause deep internal pain. This affliction is seen as a result of God's hand upon him, indicating that sin invokes God's anger and leads to consequences. As David laments his condition, he illustrates that sin's impact is primarily inward, affecting the heart and conscience before it manifests outwardly. This highlights God's righteous response to sin and His desire to lead sinners to repentance.