“Finally, be strengthened by the Lord and by His vast strength. Put on the full armor of God so that you can stand against the tactics of the Devil. For our battle is not against flesh and blood, but against the rulers, against the authorities, against the world powers of this darkness, against the spiritual forces of evil in the heavens.” (Ephesians 6:10–12, HCSB)
Know the real adversary.
Know the associates in the battle.
Know the resources for battle.