How do we know Christ's work on the cross is sufficient for salvation?
Answered in 2 sources
Christ's work is sufficient because He was weighed in our place, bearing the full weight of God's judgment for His people.
The gospel message centers on the truth that Jesus Christ took upon Himself the weight of our sins, becoming our substitute. In Isaiah 53, we read that He bore our griefs and carried our sorrows, and through His suffering, He satisfied divine justice. As He was weighed in the balances for His people, He was found lacking in terms of judgment but His lack was our gain, as He absorbed the penalty we deserved. Therefore, in Christ, His righteousness is imputed to us, and God’s satisfaction with His sacrifice assures us that it is fully sufficient for our salvation. Believers can trust in His completed work, confident that it is not based on their merit but solely on Christ's sacrifice.
Commentary