I am He that liveth, and was dead; and behold, I am alive for evermore, Amen. – Revelation 1:18

The Lord in the glory of His tenderness mentions…His atoning death. He says, “I was dead,” the original more correctly rendered is “was made dead.” Here we come upon the human nature of our Redeemer. As God and as man He had two natures, but He was not two persons. As one person He ever lives, and yet He was made to die. He came into this world in human form that He might be capable of death; the pure spirit of God could not die, it was not possible that He, the I AM, could be subject to death; but He allied Himself with humanity, and in that human form Jesus could die, and did die. In very deed, and truth, and not in semblance; Jesus bowed His head, and gave up the ghost, and they laid His corpse in the tomb of Joseph of Arimathea. Here to the child of God is a fruitful source of consolation. He died, then the atonement is complete; without the shedding of blood there is no remission, but the death of the Son of God brings plenteous pardon. There must be in the death of such a one of sufficient merit to remove guilt and cleanse transgression. Is it not written, “He hath washed us from our sins in His own blood?” Dost thou not hear that song in heaven? Will not its music make thee glad? His own blood hath washed thee; if thou believest in Him thou art clean. Look to Calvary, and as thou lookest there and perceivest that He was dead, “fear not.”

And then the master declared His endless life, “I am alive for evermore.” He who offered up the atonement lives again to claim the effect of His sacrifice. He has presented the meritorious sacrifice, and now He has gone to heaven to plead the sacrifice before the throne of God, and to lay claim to the place which He has prepared for them that love Him. Thou hast no dead Savior to trust to: thou reliest in Him who once died-this is comfort to thee, but He lives, the great Redeemer lives. He has risen from the tomb; He has climbed the hills of heaven; He sits at the right hand of the Father, prepared to defend His people. If thou hadst a Christ in the sepulcher that were sorrow upon sorrow; but thou hast a Christ in heaven, who can die no more. Be thou of good cheer. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1028.cfm