It is Christ that died, yea rather, that is risen again who is even at the right hand of God, who also maketh intercession for us. – Romans 8:34

God has punished sin; and when men say, “God must punish sin,” we answer, “Sin has been punished, for Christ has died.” Not only is our sin punished, but the sin is gone. If my friend over yonder has paid my debt, it is gone. I owe no man anything after the debt has been paid, whether by myself, or by somebody else; and if Christ took our sin upon Himself, and suffered for it, the sins for which He suffered are gone, plunged as in a shoreless sea, drowned in the Redeemer’s blood. They are gone and gone forever!

And that my sins are gone is further clear, for He rose again from the dead. “It is Christ that died, yea rather, that is risen again.” If He had not paid the debt, He would have remained in the prison of the grave; but He rose again. He has discharged the debt; and we have still another assurance that it is all gone, for the apostle goes on to speak of Christ “who is even at the right hand of God.” He would not be there if He were a debtor. If Christ owed anything to the justice of God by reason of His suretyship engagements, He would not be at God’s right hand: but He owes nothing whatever. Both the sinner and the Surety are now free. The debt is paid, and Christ is at the right hand of God. And as to our weaknesses and infirmities, He is there to plead for His people: “Who also maketh intercession for us.” He ever liveth to secure effectually the eternal salvation of every soul for whom He died, even for every one who puts his trust in Him. Are you among the number? Oh, if you, my dear hearers, knew the joy and peace that would come to you if you but trusted in the doctrine of substitution, you would not rest until you were able to say, “Christ was in my place, that I might stand in His place: my sins were laid on Him, that His righteousness might be girded on me.”…This, then is God’s great remedy for sin: “It is Christ that died.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2240.cfm