"Today I have made you a fortified city, an iron pillar and a bronze wall to stand against the whole land--against the kings of Judah, its officials, its priests and the people of the land." - Jeremiah 1:8 or from Psalm 122:7 - "May there be peace within your walls and security within your citadels." _____ Walls can be both physical and spiritual, and signify security and protection on both fronts.