For I know that my Redeemer lives, and at last He will stand upon the earth. – Job 19:25

Remember how the apostle John writes, “If any man sin, we have an Advocate with the Father, Jesus Christ the righteous.” You see, it is not merely, if we have been said to sin when we did not, but if we really sin, “we have an Advocate with the Father.” O blessed Advocate, how dost Thou clear Thy people of the sin which they have actually committed? Why, in this way; He took it up Himself,-the awful load of their guilt,-and suffered the full penalty for it. So there He stands before the eternal throne, to plead their cause; and, as He does so, He says, “Those sins, committed by My people, -I have taken them upon Myself, and suffered in the room, and place, and stead of all who will believe in Me.” O thou blessed Kinsman, how glorious art Thou in Thy grace, in that Thou hast so completely undertaken our cause that Thou hast been made sin for us, that we might be made the righteousness of God in Thee! Yes, beloved, Jesus will plead the merit of His precious blood and His spotless righteousness; and, before that powerful pleading, our sins and our transgressions shall sink beneath the flood, and shall not be remembered against us any more for ever.

In that day, too, our Vindicator will defend us against all the accusations of Satan. Our great adversary often assails and attacks us here, and the Lord says to him, as He did concerning Joshua the high priest, “The Lord rebuke thee, O Satan; even the Lord that hath chosen Jerusalem rebuke thee! “We may tell the devil, when we stand foot to foot with him, and are sore beset, that our Vindicator liveth, and we may quote to him that grand promise, “The God of peace shall bruise Satan under your feet shortly,” because our Vindicator, who is to bruise the serpent’s head, still liveth. “Rejoice not against me, O mine enemy: when I fall, I shall arise; when I sit in darkness, the Lord shall be a light unto me.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2909.cfm