However...the last church is spewed out of His mouth all the while believing it has everything all neatly wrapped up.That church is told to "buy gold tried in the fire".
Also...The church of Philadelphia has..."I have set before thee an open door, and no man can shut it..." (Rev 3:8)
The last church however has... "Behold, I stand at the door, and knock..."
The church that has "a little strength" has an open door,the church that thinks it has it all (and yet is poor,blind and naked!)has a shut door and must buy gold tried in the fire.
I think that door is the rapture.