How do we know Jesus Christ's sacrifice is sufficient for salvation?

The sufficiency of Christ's sacrifice is affirmed in many scripture passages, notably Hebrews 9:28, which states that Christ was offered once to bear the sins of many. This act was not merely a temporary measure, but rather a complete and perfect sacrifice that fulfilled the demands of God’s justice. In claiming that Jesus had to live a righteous life before dying, He secured a perfect standard that God could accept on behalf of sinners. For those who look to Him in faith, this sacrifice assures them that their sins are forgiven and that they are accepted by God.