As we move though our series on the Armour of God, we learn more about the incredible sources of protection that the Lord provides.
In the same way that soldiers would use a horn to summon reinforcements or signal a change in plan - we use prayer to signal our needs to God.
There is no horn listed in the Armour of God, but Ephesians 6:18-20 urges us to pray constantly. No soldier would ever go into battle without some means of emergency communication, and prayer is our way of communicating with God. Prayer is the ultimate weapon in our spiritual struggles here on Earth.