Ye must be born again. – John 3:7

There are, doubtless, some who think that they are all right because they frequent sermons. They delight to be found hearing the gospel. Now, in this you do well, for, “Faith cometh by hearing, and hearing by the word of God”; but, if you suppose that the mere hearing of a sermon with the outward ear can save you, you suppose what is untrue, and you build the house of your hope on sand…”Oh, but,” says another, “I attend prayer meetings.” Your being found in the place where prayer is wont to be made may be no true sign of grace. “Ay, but I do more than that, for I have prayers in my own house.” Yes, and very proper, too. I would that all did the same; I am grieved that any should neglect the ordinance of family prayer. But yet, if you think that the reading of a form of prayer in your household, or even the use of extempore prayer, is a thing to be relied upon for salvation, you do greatly err…”But I regularly read a chapter,” says one. I am extremely glad you do, and God bless that chapter to you! I would that all were in the habit of reading the Bible regularly, and endeavouring to understand it; but, if you trust in your Bible-readings as a ground of salvation, you are resting upon a mere soap-bubble which will burst under your weight. Faith in the Lord Jesus Christ, producing in the soul a change of heart, a new birth unto God, this is what is wanted; and, apart from that, all the Bible reading you ever practice can do you no good whatsoever. 

“Ye must be born again. Ye must be born again”; and if there be not this inward change, then vain is all outward observance. You may wash a corpse, you may clothe that corpse in the purest white shroud that was ever woven, but when all is done it does not live; and what are all the outward devotions of a carnal man but dead things which bring no life with them to men dead in sin? ~ C.H. Spurgeon

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