Pastor John Samuel Barnett gives the background for why the armor of God is described as armor. He then gives us the reason why we are to put on the armor and the power God surrounds us with so that we may glorify God in both our life and our actions in that life.

https://youtu.be/5gjxddqDEGk
(From 2016APR03 – SWS-16 – How God Uses the Full Armor of God to Deliver Us from the Evil One)