How do we know Christ's sacrifice is better than those in the Old Testament?

The sacrifice of Christ is affirmed as superior in the book of Hebrews, which contrasts it with the Old Testament system of continual burnt offerings. In Hebrews 10:10, it states that we are sanctified through the offering of the body of Jesus Christ once for all time. Unlike the high priests in the Old Testament, who stood daily ministering and offering sacrifices that could never take away sins (Hebrews 10:11), Christ's singular offering was perfect and sufficient for the redemption of His people. This once-for-all sacrifice accomplished what countless animal sacrifices could not, effectively purifying the conscience and reconciling believers to God eternally.