How do we know Christ's sacrifice takes away our sin?

The assurance of Christ's sacrifice lies in the reality that our sins were transferred to Him, allowing Him to take the punishment in our place. As He Himself acknowledged in Psalm 40:12, the innumerable evils encompassing Him were truly His people's sins laid upon Him. This authentic transfer of sin means that He fully experienced the shame and penalty due to our transgressions. Therefore, His sacrifice is a full and complete atonement for sin, ensuring that it no longer condemns those who believe.