That alone is a big job. But our Lord doesn t leave us without weapons of defense. Paul compares our Christian armor to armor the Ephesians would have been familiar with, that of the Romans. A Roman soldier s girdle is what held his entire uniform together and kept it in place. Our loins are the center of our physical being and Paul is telling us to guard our center with truth and that truth is what holds all of our Christian equipment together.
Truth is the core of Christian faith.
A Roman breastplate was a metal shield of sorts that strapped on and guarded the soldier s chest. Within the chest lies our heart. When our heart stops beating we die. Thus, the heart is a key target that an enemy will try to hit to end our lives. Our heart is also symbolic as the home of our spirit.