Why is it significant to say 'It is finished'?

'It is finished' are profound words spoken by Jesus on the cross that declare the completeness of His work in securing salvation for believers (John 19:30). This phrase indicates that all the prophecies concerning His suffering and sacrifice have been fulfilled, and the demands of the law have been satisfied. It marks the end of the old covenant sacrificial system, as Jesus became the ultimate sacrifice for sin. In a theological sense, it assures believers that there is nothing more needed for salvation—Christ's work is complete, and we can rest in Him for our justification and eternal life.