(Pro 25:28 KJV) He that hath no rule over his own spirit is like a city that is broken down, and without walls.
Historically “walls” (2346) have been a source of protection and liberty. In a culture that had a tyrannical conqueror in charge the walls of cities would either be “broken” (6555) down or not allowed at all. This would allow the ruler easy access to his subjects and keep the subjects on a short leash out of fear.
It would also leave them open to attacks by criminals and foreign invaders.
Walls need to be maintained. If not constantly worked on they would develop cracks and begin to crumble.
Walls needed to be guarded. The best walls could be climbed by people with evil intent.
So? How are the walls of your life? Are you maintaining them? Are you on guard? Sometimes it only takes one moment of slackness to bring disaster.