My question has to do with the “falling away” of 2 Thes. 2:3. I understand that many will be deceived by/into the apostate church of the End Times through various avenues. If someone starts out as a true Christian but in the process of living becomes deceived and does not realize nor repent of this but continues to sincerely believe they are following Jesus even though they have fallen away from the Gospel they were saved with and their relationship with Jesus, have they lost their salvation?
The people who are being drawn away from true Christianity into the apostate “church” are Christians in name only who have never had a true heart conversion. We know this because in 2 Cor. 1:21-22, Paul wrote that God accepted responsibility for keeping us saved when He set His seal of ownership on us and put His Spirit in our heart as a deposit guaranteeing what is to come.
In John 6:38-40 Jesus said he would never lose any of us. John 10:27-30 and Romans 8:38-39 both say that no one can ever get us away from the Lord. That includes us.