How do we know Christ's sacrifice was enough to atone for sins?

The atonement of Christ is rooted in His role as both High Priest and Sacrifice. In Hebrews 5 and Exodus 29, we see that the sacrifices of the old covenant were mere shadows of Christ's final sacrifice. As the perfect Lamb of God, Jesus fulfilled the requirements for atonement without the need for repetitive sacrifices. His blood, shed on the cross, is the ultimate atonement for sin, ensuring that all who trust in Him are cleansed and accepted by God. Thus, confidence in His sacrifice rests on His unique qualification—sinless, wholly dedicated, and God-appointed—to bear the iniquity of His people.