For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven. -Matthew 5:20

(O)ur Lord expects from His people a more exact performance of the divine will than even the Pharisees pretend to give. Observe, (in Matthew 6:17-20) He speaks here about jots and tittles never passing away, and about those who break the least of His commandments, and teach men so; and I gather that He would have us observe the very least of His words and treasure up His commandments. Do you think, dear brethren, there would be so many sects among Christians if all believers honestly wanted to know the truth and to know Christ’s will? I do not think there would be. I cannot think our Lord has written a book so doubtful and ambiguous in its expressions that men need differ in interpreting it upon plain points. I am afraid we bring prejudice to it, the prejudice of our constitutional temperament, or of our parents, or of the church with which we are associated, and we pay reverence to somebody else’s book, perhaps a catechism, perhaps the Book of Common Prayer, over and beyond the Bible itself. Now, this is all wrong, and we must purge ourselves of it and come to the word of God itself: and, when we come to this book, it must be candidly and humbly, with this feeling, “I desire now to unlearn the most precious doctrine or practice I have ever learned if the Lord will show me that it is inconsistent with His will; and I desire to learn that truth which will bring me most into derision, or that ordinance which will submit me to the greatest inconvenience, if it is His will, for I am His servant, and I desire nothing to support my own opinion, or to be my own rule.” I think we shall all get pretty near together, if, in the Spirit of God, we begin reading our Bibles in this way. Surely the Lord expects this of us. I do not think He expects this of some professors, for certainly He will never get it; they are quite satisfied to say, “I attend my parish church, and that is the faith of our church;” or, “My grandmother joined the Dissenters, and, therefore, I keep to them; besides, after all you know there are no sects in heaven.” That last assertion is one of the most shallow pretences ever designed on earth, to excuse men from being scrupulously obedient to every word of their Lord and Master. I do not doubt, O disciple, but that you will reach heaven, even though you mistake some of the Master’s teaching, but I do doubt your ever reaching there if you wilfully despise His words, or decline to learn what He came to teach. Our Lord has said unto us, “Go ye therefore, and disciple all nations, baptising them in the name of the Father, and of the Son, and of the Holy Ghost,” and therefore, if you will not become disciples, and learn of Christ, we have not even begun with you, neither can you be baptised, or bear the name of the Triune God. Jesus will have you obey His will, as well as trust His grace. Mind that, beloved. This demand for exact obedience is no word of mine, but of the Master. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1029.cfm