How do we know Jesus is the propitiation for our sins?

Jesus is affirmed as the propitiation for our sins in 1 John 4:10, which states that God sent His Son to be a sacrifice to remove our sins. This is a fundamental aspect of atonement in Reformed theology, where Jesus, as the sinless Lamb, absorbed the full wrath of God due for sin. By acknowledging Christ's sacrificial death, we see the completion of God's redemptive plan for His people. His work on the cross satisfies divine justice, allowing believers to stand justified before God, free from condemnation.