How do we know that Christ has accomplished our peace?

The complete peace that believers have is rooted in Christ's work of propitiation. In 1 John 4:10, we see that 'He loved us and sent His Son to be the propitiation for our sins.' This means that Christ has fully satisfied the wrath of God against sin, making atonement for His people. Colossians 1:20 reinforces this by affirming that 'through the blood of His cross,' we are reconciled to God. Believers can rest assured that through faith in Christ, all transgressions are atoned for, thereby securing our peace with God and eliminating any enmity caused by sin.