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

The sufficiency of Jesus' sacrifice is affirmed in Scripture, particularly in Hebrews 10:14, which states that by one offering He has perfected forever those who are being sanctified. This indicates that Christ's death on the cross completely satisfied God's justice regarding sin. Unlike the repetitive sacrifices made by the Old Testament priests, which were inadequate to take away sin, Jesus' self-offering was perfect and final. His resurrection further validates the completeness of His work, demonstrating that He conquered sin and death, thus providing eternal redemption for His people (Hebrews 9:12). As a result, believers can have full confidence in the efficacy of His sacrifice.