From Mike Ratliff at Possessing the Treasure:
What did Jesus mean when He said, “It is finished!” in John 19:30?
by Mike Ratliff
5 But He was pierced through for our transgressions,
He was crushed for our iniquities;
The chastening for our well- being fell upon Him,
And by His scourging we are healed. (Isaiah 53:5 NASB)
One of the teachings from the leadership of the Word-Faith movement is that Jesus’ suffering and death on the cross was insufficient to accomplish the salvation of His people. They teach that Jesus then had to go to Hell to suffer as a lost person by being tormented by Satan. If that were true then what did Jesus mean when He said, “It is finished”? (John 19:30)
Full article here.