Why is understanding Christ's victory important for Christians?

Christ’s victory offers profound assurance to believers amid their struggles. He acknowledges the disciples' forthcoming failures but immediately declares that they can 'be of good cheer' because He has overcome the world. This victory is not based on the believer's faithfulness but on Christ's unchanging faithfulness. Recognizing that Christ has conquered sin and death emphasizes that believers can find their identity and assurance in His completed work, granting them peace despite adversities.