How do we know that Jesus' sacrifice was sufficient for our salvation?

The assurance that Jesus' sacrifice is sufficient for salvation is grounded in the doctrine of substitutionary atonement, where Christ bore the wrath of God for His people. As stated in Romans 8:32, 'He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things?' This underscores the truth that Christ's atoning work fulfilled the legal requirements of the law, offering redemption to those who believe. His suffering and death on the cross were the ultimate expressions of divine mercy and compassion, ensuring that all who are in Christ are not subjected to God's wrath but are granted forgiveness and eternal life. Thus, believers can have unwavering confidence in the completeness of Christ's redemptive work.