What is the significance of Christ's last words, 'It is finished'?

'It is finished' is a profound declaration made by Christ on the cross that encapsulates the entirety of His redemptive mission. This phrase emphasizes that the work of atonement—paying the penalty for sin and fulfilling the Law—was fully accomplished. It signifies the completion of the sacrificial system, which pointed to Him as the ultimate Lamb of God, who takes away the sin of the world. Theologically, this moment affirms that nothing further is required for salvation; it is solely by His grace and faith in His completed work that believers are justified and reconciled to God. Thus, His last words not only provide assurance to believers of their complete redemption but also invite them to rest in the sufficiency of His sacrifice for all their sin.