The helmet was one of the most important pieces of a Roman soldier's armor. It provided the soldier with identity (commanders would know which unit was which because of the helmet) and protection.
We too have a helmet! Faith in Jesus changes who we are, and this helmet also protects our minds.
In this message, we learn how to focus on our mind being saved and drive out (or "take captive"!) any thoughts that aren't pleasing to God. We can BE saved but not THINK saved.