Quoting other Scripture is not addressing the issue, which is apostasy. Now faithman for a man whose profile states he is a Bible teacher surely you can do a teaching on a specific verse, or can't you?
I posted the definition of apostasy and have given you clear Biblical teaching that states in the end times believers will fall away. 1 John 2:19 is not referring to believers, it is referring to heretics and those who never had a saving faith in Christ. We are warned that in the end times false teachers will arise and deceive many. John writes that the end times had already started as does Paul. There are many TV evangelists who claim to have healed many people; but those claims are false and can be so documented, yet thousands maybe millions of Christians have bought into their heretical teachings.
Open your eyes man and read what the Spirit has revealed.