“Behold, I will cast her into a bed, and them that commit adultery with her into great tribulation, except they repent of their deeds.” (Revelation 2:22)
Jesus casts the false church organization “into a bed” of spiritual harlotry. How? By a true preacher exposing her (the false fellowship) to be what she is: a selfish, lusting after evil, harlot – not the pure bride of Christ! Everyone who is found fellowshiping her (having relations with her) feels the wrath and tribulation caused by a true angel/messenger preaching the truth and pouring out the judgment of the Word of God against this false condition. This also is God’s mercy, because they can come out from under the tribulation, if they will truly “repent of their deeds” and forsake sin and the false fellowship relationship.
“Know ye not that your bodies are the members of Christ? shall I then take the members of Christ, and make them the members of an harlot? God forbid. What? know ye not that he which is joined to an harlot is one body? for two, saith he, shall be one flesh. But he that is joined unto the Lord is one spirit. Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body. What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own? For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God’s.” (I Cor 6:15-20)
You cannot fellowship a false religious system where people are not living holy and expect to stay holy yourself for long. Eventually you will be seduced by this harlot spirit, and you also will be claiming Christ and yet be having relations with the devil through some sin you will commit. The so-called “Christian” church that is insincere will teach you that you can’t live any better. Therefore you’ll continue to live with sin in your life, yet she (your church) will tell you “it’s OK – Christ still accepts you.” If you are married, would you accept that from your companion? If they committed adultery with someone else on a regular basis, and every time just said “forgive me, I just have to do it, but I still love you” would you believe their sincerity? Let us be honest with ourselves and with Christ whom we claim to be married to!
“Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness? And what concord hath Christ with Belial? or what part hath he that believeth with an infidel? And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people. Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you. And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty.” (II Cor 6:14-18)
“And I heard another voice from heaven, saying, Come out of her, my people, that ye be not partakers of her sins, and that ye receive not of her plagues. For her sins have reached unto heaven, and God hath remembered her iniquities.” (Revelation 18:4-5)
It does not matter what church you claim to be part of (Catholic, Protestant, or otherwise), if they are not faithful, true, and living pure for Jesus, you are in the wrong church! I would quickly flee from the wrath to come that is referred to in the next verse of Revelation 2:23.