Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power… – Revelation 20:6

Pray, you dear people of God that are awake, that the sinner may be awakened, for there is this awful danger that he may sleep himself into hell. Spiritual sleep deepens and the slumberer becomes more heavy still, the stupor more dense, till the conscience grows seared, and the soul is unimpressionable; the flesh is turned into stone, the heart is harder than steel. It may be that some of those who hear these words of warning may never wake to think about their souls till in hell they lift up their eyes. What an awful lifting up of the eyes will that be! O you who are now peaceful and secure, what a change awaits you! Hurled from vainglorious security to blank despair in a moment! You took it all so easily: you said, “Let me alone; do not worry me; there’s time enough. The preacher ought not to frighten us with these bugbears; we all have a great deal else to do besides listening to horrible stories of hell and damnation;” and so you wrapped it up, and so you smoothed it over, but the end thereof who shall describe? Some persons on their dying beds just wake up in time to see their danger, but not to escape from it: they are carried right over the cataract of judgement and wrath. They are gone, for ever gone, where mercy is succeeded by justice, and hope forbidden to enter. Let much prayer go up from believing hearts that God would awaken sinners now… Ask for the arm of God to be revealed while the heavenly message is delivered; for His is our message: “Awake thou that sleepest, and arise from the dead, and Christ shall give thee light.”

Come, thou guilty one, awake! for mercy waits for thee. Come and receive the mercy which Jesus Christ is ready to bestow upon thee! God give thee waking grace and saving grace. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0996.cfm