He that believeth on the Son hath everlasting life: and he that believeth not the Son shall not see life; but the wrath of God abideth on him. – John 3:36

If one poor soul that puts his trust in Christ should be cast away it would spoil heaven itself. What security is there for glorified spirits that their splendours shall endure except the promise of a faithful, covenant-keeping God? If, then, looking down from their celestial seats, they behold the great Father breaking His promise, and the Son of God unable to save those for whom He died, then will they say, “We will lay our harps aside, and put our palms away, for we, too, after all, may perish.” See, then, O man, heaven and earth, ay, God and His Christ, as to their credit and their glory, do stand and fall with the salvation of every believing sinner. If I were in your stead, I think that I should bless God to have this matter put so plainly to me. Come, poor soul; come at once. You have heard the gospel long enough; now obey it. You have heard about Christ long enough; now trust in Him. You have been invited and entreated and pleaded with; now yield to His grace. Yield to joy and peace by trusting in Him who will give you both of these as soon as you have rested in Him.

Look! sinner, look! A look out of thyself will save thee. Look away from all thy works, and prayers, and tears, and feelings, and church-goings, and chapel-goings, and sacraments, and ministers. Look alone to Jesus. Look at once to Him who on the bloody tree made expiation, and who bids thee look, and thou shalt live. God make this present hour to be the period of thy new birth. I pray it, and so do His people. The Lord hearken to our intercessions, for Christ’s sake. Amen. ~ C.H. Spugeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1826.cfm