He that believeth on Him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. – John 3:18

The imminent peril is to be without Christ Himself. Do you see, there, the Saviour in human form-God made flesh, dwelling among us? He loves His people, and came to earth to wipe out an iniquity which had stained them most vilely, and to work out a righteousness which should cover them most gloriously, but without Christ that living Saviour is nothing to you. Do you see Him led away as a sheep to the slaughter, fastened to the cruel wood bleeding, dying? Without Christ you are without the virtue of that great sacrifice; you are without the merit of that atoning blood. Do you see Him lying in the tomb of Joseph of Arimathea, asleep in death? That sleep is a burial of all the sins of His people, but without Christ your sins are not atoned for; your transgressions are yet unburied; they walk the earth; they shall go before you to judgment; they shall clamour for your condemnation; they shall drag you down without hope. Without Christ, remember, you have no share in His resurrection. Bursting the bonds of death, you, too, shall rise, but not to newness of life, nor yet to glory, for shame and everlasting contempt shall be your portion if you be without Christ… Oh! my dear hearers, I cannot tell you what unutterable abysses of wretchedness and misery are comprised here within the fulness of the meaning of these dreadful words-without Christ.~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3472.cfm