But this is what Arthur Pink says.
"It is finished." What was finished? The work of atonement. What is the value of that to us? This: to the sinner, it is a message of glad tidings. All that a holy God requires has been done. Nothing is left for the sinner to add. No works from us are demanded as the price of our salvation. All that is necessary for the sinner is to rest now by faith upon what Christ did. "The gift of God is eternal life through Jesus Christ our Lord" (Rom. 6:23). To the believer, the knowledge that the atoning work of Christ is finished brings a sweet relief over against all the defects and imperfections of his services. There is much of sin and vanity in the very best of our efforts, but the grand relief is that we are "complete" in Christ (Col. 2:10)! Christ and his finished work is the ground of all our hopes.
Upon a Life I did not live,
Upon a Death I did not die,
Another’s death Another’s life
I cast my soul eternally
Bold shall I stand in that great day,
For who, aught to my charge can lay?
Fully absolved by Christ I am,
From sin’s tremendous curse and blame.
Maybe we're all weaklings. haha
praise God for His finished work on the cross