What does it mean that the church is without walls?

In the context of Zechariah 2:4-5, the declaration that Jerusalem shall be as towns without walls signifies the organic and expansive nature of God's people, indicating that they are not confined by physical barriers. The true protection comes from God Himself, who surrounds the church as a wall of fire, signifying both His presence and glory among His people. This metaphor illustrates that while physical walls could provide relatively limited safety, God's spiritual protection is comprehensive and eternal, ensuring that His people can flourish regardless of external circumstances.