Holding Up the Shield of Faith
Every believer is enlisted in God's army as His soldier and is actively engaged in spiritual warfare against Satan and his cohorts.
You are not fighting for victory but in victory because Christ's victory is your victory over Satan and his cohorts.
However, it takes you putting on the whole armor of God to enjoy, enforce, and demonstrate the victory Christ has won for you over Satan and his cohorts and works.
This enlightening teaching aptly explains how to take up the Shield of Faith to extinguish all the devil's flaming arrows.