For the LORD thy God is a consuming fire, even a jealous God. – Deuteronomy 4:24

The Lord Jesus in His church is not indifferent to the conduct of His people. We are not to suppose that because the sin of all God’s elect is pardoned, therefore it is of small consequence how they live. By no manner of means. The Master of this great house is not blind nor deaf, neither is He a person who is utterly careless as to how the house is managed; on the contrary, as God is a jealous God, so is Christ a jealous husband to His church. He will not tolerate in her what He would tolerate in the world. She lies near His heart, and she must be chaste to Him. What a solemn work the Lord did in the early church. That story of Ananias and Sapphira-it is often used most properly to illustrate the danger of lying; but that is not the point of the narrative. Ananias and Sapphira were members of the church at Jerusalem, and they lied not unto men, which would have been sin enough, but in lying to the church officers they lied unto God, and the result was their sudden death. Now, you are not to suppose that this was a solitary case. Wherever there is a true church of God, the judgments of God are always going on in it…Judgments are begun in the house of God and are always going on there…The Lord Jesus Christ looking around His church, if He sees anything evil in it, will do one of two things; either He will go right away from His church because the evil is tolerated there, and He will leave that church to be like Laodicea, to go on from bad to worse, till it becomes no church at all; or else He will come and He will trim the lamp, or to use the figure of the fifteenth of John, He will prune the vine branch and with His knife will cut off this member, and the other, and cast them into the fire; while, as for the rest, He will cut them till they bleed again, because they are fruit-bearing members, but they have too much wood, and He wants them to bring forth more fruit. It is not a trifling matter to be in the church of God. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1035.cfm