You must be ready to firmly resist the devil and his evil spirits [MET], just like soldiers must be ready to resist the enemy. Prepare for doing that by doing these things: To be strong spiritually, hold firmly to God’s truth, just like soldiers prepare ◄to stand firm against/to firmly resist► their enemies by fastening their belts around their waists [MET]. Act righteously in order to protect yourself against demonic attacks, just like soldiers put on breastplates to protect their chests against their enemies’ attacks [MET].