Ephesians 6:12 KJV
12 For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
The amplified version of this scripture is...
12 For our struggle is not against flesh and blood [contending only with physical opponents], but against the rulers, against the powers, against the world forces of this [present] darkness, against the spiritual forces of wickedness in the heavenly (supernatural) places.
This is a spiritual battle and not a battle of physical opponents. I often, have to remind myself of this when I deal with people. It's VERY easy to forget this foundational principle