I've always loved castles. Castles with high towers overlooking lazy rivers and lush valleys. Castles with spires like Cinderella's castle at Disney World. Originally, castles were built to defend against invaders. Many castles had high stone walls and a deep moat. To enter this kind of castle, people walked across a drawbridge. When the drawbridge was pulled up, it closed the only entrance. So if an enemy came, people would run into the fortress and pull up the drawbridge after them. Although they might see the enemy on the field, the people were safe inside the castle.
Wouldn't it be nice to have a castle where you could go to be safe? If you were scared or didn't feel well, you could go into your castle and be safe from invaders or even from sickness. Actually, you do have a castle. It's not a physical place with high walls and a moat. God is your castle.
A man who lived long ago, and in dangerous times, wrote, "The Lord is my rock, and my fortress, and my deliverer; my God, my strength, in whom I will trust" [Ps. 18:2]. God is so powerful that no enemy can attack Him. No army of fear or sickness can get through the castle of God to even touch you. You are safe within God, surrounded by a moat of spiritual strength.