How do we know that Christ's work is perfect?

The author of Hebrews makes a compelling case for the perfection of Christ's work throughout the book. By comparing Christ to the Old Testament priests and sacrificial system, it's clear that Christ is the ultimate fulfillment of God's promise. His sacrifice not only meets the requirements of the law but also establishes a new covenant where believers can have confidence and assurance of their redemption. This certainty is built on the faithfulness of God who promised to redeem His people completely, as expressed beautifully in Hebrews 10:19-25.