having shod your feet with the preparation of the gospel of peace;
Roman shoes were called the caligulae and are the most common article found in archaeological digs of Roman sites. Made of leather, the shoe’s longevity comes from the many pieces of metal, or hob nails, imbedded in the bottom. These unique additions to each shoe gave them remarkable longevity, making them seemingly last forever.
They also provided great traction for the soldier who had to climb slippery rocks or run through loose sand. And they turned each shoe into a weapon. If an enemy had been knocked down but not subdued during hand to hand combat, one stomp with the caligula could easily spell death.
Here, Paul reminds the Ephesians that the gospel is the key to longevity: the believer will indeed last forever! Further, it will keep the believer from slipping and falling, regardless of the surface being walked on. And one stomp with the shoes of the gospel will stop the enemy in his tracks.