Jesus answered, “Most assuredly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God. That which is born of the flesh is flesh, and that which is born of the Spirit is spirit.” – John 3:5,6

It was a superfluity that He should hang upon the cross if our own merits can open a way of salvation. How could the great God permit and even ordain such a death if we could be saved by our own merits? Why that bloody sweat? Why that nailing of the hands and feet? Why that, “Eli, Eli, lama sabachthani?” if of yourselves you can be saved? But it is not so. You cannot save yourselves by efforts of your own, and hence we have to come to you, shutting you up to this one thing only-that you must be saved by faith in Him whom God has set forth to be a propitiation for sin. You need the love of God; you need the power of the Holy Ghost; you need to be quickened into newness of life; you need to be helped to run in the ways of righteousness: in a word, you need everything until you come to Christ, and everything that you want you will find in Him, and in Him alone. Within yourselves there is nothing that you want. You may search, and look, and turn the dunghill of your nature over and over again, but you will never find the jewel of salvation there. That pearl of great price is in the Lord who assumed human nature, and lived, and loved, and died, and rose again, that He might redeem men from the fall, and all the sin consequent thereon. Oh, that you would look away from self once for all! ~ C.H.Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2210.cfm