its pretty self explanatory . The Tribulation of Satan is what this concerns .
Consider the parable, where Christ illustrated believers, as the Body ,Christ being the head .. Matthew 5:30
If a member of the body offend thee, cut it off, because its better they end up in hell alone, rather than drag down the whole body .
False teachings will do it, because it will clash with Gods plans as written . If you cease being a church, its members make it up, they cant be said to have eternal life. Example, Christ said as much about Sardis .
The candlesticks, aka lamp stands, are the churches in revelation
Rev 1:20 The mystery of the seven stars which thou sawest in my right hand, and the seven golden candlesticks. The seven stars are the angels of the seven churches: and the seven candlesticks which thou sawest are the seven churches.