Are you, then, disagreeing with John MacArthur?Eternal security is undeniably supported by scriptures.
Loss of salvation is likewise undeniably supported by scriptures.
Hence the long-standing disagreement between Christians (despite Acts 15).
The question is: what dispensation are you quoting from? Those seven churches are primarily tribulation churches, not church-age churches.
In the church age, salvation is entirely by grace through faith: therefore eternal security.
In the tribulation and the millennial kingdom, as it was under Moses' law, salvation is by faith and works: therefore loss of salvation.
- Cue the howls.
"These letters, as you know, are directed at seven churches, actual churches, historical churches in actual cities in Asia Minor. But they transcend their time and space and they become model letters to various kinds of churches that exist in all eras of church history." - John MacArthur Laodicea: The Lukewarm Church, Part 1