Therefore bear fruits worthy of repentance, and do not begin to say to yourselves, ‘We have Abraham as our father.’ For I say to you that God is able to raise up children to Abraham from these stones. – Luke 3:8

How easy it is to be deceived with the notion that we are converted when we still need to be converted; to fancy that, because we have the approbation of our minister and of our Christian friends, we must, therefore, necessarily be the people of God. There is only one true new birth, but there are fifty counterfeits of it. In this respect, then, buy the truth. Let me have you beware of an experience which has a faith in it that was never attended with repentance. I am afraid of a dry-eyed faith. That faith seems to me to be the faith of God’s elect, whose eyes are full of tears. If thou hast never felt thyself a sinner, never trembled under the law of God, never felt that thou hast deserved to be cast into hell, I am afraid thy faith is a mere presumption, and not the faith that looks to Christ. Beware of an experience that lies in talk, and not in feeling. Mr. Talkative, in Bunyan’s Pilgrim’s Progress could speak very glibly about religion; no man more so than he; he was fit to take the chair in an assembly of divines; but it was not heart-work; it was all surface-work. Plough deep, my brethren. Feel what you believe. Let it be with you real homework, soul-work, the work of God the Holy Ghost-not a temporary excitement, not head-knowledge, not theory. May the truth be burned into your souls by the operation of the Holy Ghost. In this respect, buy the truth. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3449.cfm