Yes, but it was a church body that was obviously filled to capacity with apostates and reprobates.
What Jesus expressed there was not something that applied only to those in the Church, but to all who hear the words of the prophecy (go back to Rev 1:3). Therefore, if you hear those words, then the words apply to you, whether you are already saved, or whether you are still in rebellion against God.
The words in the Book of Revelation are not only written to the seven Churches in Asia, but to all who hear them. So when Jesus says "Behold, I stand at the door, and knock: if any man hear my voice..." That means YOU. No matter what your condition. If you hear those words, then those words were meant for you.