"Verily, I say unto you, except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven." - Matthew 18:3.
If you ask others, upon what foundation they have built their hope of heaven, they will tell you, that they have been baptized, that their fathers and mothers, presented them to the Lord Jesus Christ in their infancy; and though, instead of fighting under Christ's banner, they have been fighting against him, almost ever since they were baptized, yet because they have been admitted to church, and their names are in the Register book of the parish, therefore they will make us believe, that their names are also written in the book of life. But a great many, who will not build their hopes of salvation upon such a sorry rotten foundation as this, yet if they are, what we generally call, negatively good people; if they live so as their neighbors cannot say that they do anybody harm, they do not doubt but they shall be happy when they die; nay, I have found many such die, as the scripture speaks, "without any hands in their death." And if a person is what the world calls an honest moral man, if he does justly, and, what the world calls, love a little mercy, is not and then good-natured, reacheth out his hand to the poor, receives the sacrament once or twice a year, and is outwardly sober and honest; the world looks upon such an one as a Christian indeed, and doubtless we are to judge charitably of every such person.
There are many likewise, who go on in a round of duties, a model of performances, that think they shall go to heaven; but if you examine them, though they have a Christ in their heads, they have no Christ in their hearts. The Lord Jesus Christ knew this full well; he knew how desperately wicked and deceitful men's hearts were; he knew very well how many would go to hell even by the very gates of heaven, how many would climb up even to the door, and go so near as to knock at it, and yet after all be dismissed with a "verily I know you not." The Lord, therefore, plainly tells us, what great change must be wrought in us, and what must be done for us, before we can have any well grounded hopes of entering into the kingdom of heaven. Hence, he tells Nicodemus, "that unless a man be born again, and from above, and unless a man be born of water and of the Spirit, he cannot enter into the kingdom of God." And of all the solemn declarations of our Lord, I mean with respect to this, perhaps the words of the text are one of the most solemn, "except, (says Christ) ye be converted, and become as little children, ye shall not enter into the kingdom of heaven." By George Whitefield