How do we know Christ's work of redemption is finished?

The assertion that Christ's work of redemption is finished is fundamentally rooted in His own declaration from the cross in John 19:30. In this moment, He confirmed that all that was necessary for the salvation of His people was accomplished. The gospel of grace proclaims that our acceptance before God does not depend on our works but is solely based on the perfect satisfaction fulfilled in Jesus Christ. Furthermore, 2 Timothy 4:7 emphasizes that Paul, too, could claim he finished his course only because it was Christ who enabled him to fight the good fight. Our assurance rests in the completed work of the Redeemer, bearing the weight of our sins, liberating us from the burden of the law.