How do we know Christ's redemption is sufficient for us?

Hebrews 10:14 emphasizes that by Christ's singular offering, He has perfected forever those who are sanctified. This speaks to the completeness of His work; it is not a continual offering as in the Old Testament sacrifices but a one-time event that fully satisfies God's justice. Furthermore, the witness of the Holy Spirit to believers confirms this truth, assuring them that their sins are remembered no more (Hebrews 10:17). Therefore, the sufficiency of Christ's redemption guarantees our salvation if we are truly in Him.