How do we know that Christ's work was successful after His humiliation?

The successful completion of Christ's work is affirmed throughout Scripture, particularly in Hebrews 10:11-12, where the author contrasts Jesus with the Old Testament priests. Unlike the priests who offered sacrifices repeatedly, Christ offered one sacrifice for sins forever and then sat down at the right hand of God. This act of sitting signifies that His work was complete and that no further sacrifice is needed. His exaltation was a direct result of His successful atonement for sin, proving that He has perfected forever those who are being sanctified. This underscores the doctrine of justification by faith, where believers can rest assured that their acceptance before God is based solely on Christ's finished work, not their own merits.