…begin not to say within yourselves, We have Abraham as our father… – Like 3:8

As soon as ever John began to preach, the men of Jewish race, proud of their pedigree, pressed near; and John, with all the courage that a servant of the Lord could have, said, “Begin not to say within yourselves, We have Abraham to our father: for I say unto you, That God is able of these stones to raise up children unto Abraham.” You see the drift of his preaching, do you not? He says, practically, “Men and women, there is no virtue in your boasted privileges, there is no merit in your religious descent. As for supposing yourselves to be the peculiar people of God, you are not to be saved that way. Say not, We have Abraham as our father.” Oh, how many hug that idea, “My father was a Christian.” Others say, “Well, I live in a Christian country.” They suppose that there is something in the very race from which they have sprung. Away with all such notions, for whatever external privileges you may have had, they are not sufficient to secure salvation for you.

So John spoke right straight out; and this, I believe, is a great way of preparing men for coming to Christ, when you tell them, “It is not your early training, it is not your going to church or chapel, it is not your infant sprinkling and your confirmation, it is not even your adult baptism, nor your saying prayers and reading the Bible, that will save you; but ‘ye must be born again.’ There must be an inward spiritual change, wrought by the Holy Spirit. You must believe in Jesus Christ, whom God has sent, and you must so believe in Him as to be made new creatures in Him, or else you cannot be saved.” Now, when men realize that all this is true, it startles them out of their false refuges, and makes them ready to flee to the only true refuge… ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2404.cfm