How do we know Jesus' sacrifice for sanctification is sufficient?
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Jesus' sacrifice is sufficient as it is described as once for all, perfecting forever those who are being sanctified.
The sufficiency of Jesus’ sacrifice for our sanctification is affirmed in Hebrews 10:10 and 10:14, where believers are assured that His single offering perfected us forever. This means that the sanctification we receive through Christ’s death cannot be lost or diminished. Unlike the countless animal sacrifices under the Old Covenant, which could never fully atone for sin, Christ’s offering was eternal and complete. By His death, He has not only separated us from our sins but has also consecrated us unto God, making us holy in His sight. The once-for-all aspect of His sacrifice highlights its all-sufficient nature, confirming that we have no need to seek further means of sanctification.
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