Unfortunately the cults do seduce and corrupt believers who had entrusted themselves to His sacrifice alone. By your definition of a church, do they comprise a church within a church, or just a church ?
It can include any denomination or no denomination. It can include a handful of illiterate natives in the darkest jungle who get together to pray and worship. They are his and gathered. It can be a “house church” or a gathering in a movie theater on Sunday. If they are His and gathered, they are a gathering.
“Interesting doctrine
Does it include those believers watching a movie at the movie theater ?
How far away can they be from each other physically and still make up your your church ?
Do two make up a gathering
Is the FR religion forum a virtual church of the kind you define ? “
You’re so silly!
“Straining at a gnat and swallowing a camel!”