When going into battle it is important to know something about your enemy. In WWII the German Commanders and American Commanders read a lot of information about one another. They read about their families, their education, their personalities, and their leadership style. But one of the key elements they read about was their strategy in war and their history of previous battles. They tried to anticipate their opponents next move so that they could counter attack.
So it is with the Christian and our spiritual enemies, the demons of darkness. We read about them in both the Old and New Testaments to determine what ways they attack and then we form a counter against them.
Ephesians 6:10-11 ESV Finally, be strong in the Lord and in the strength of his might. (11) Put on the whole armor of God, that you may be able to stand against the schemes of the devil.
2 Corinthians 2:11 ESV so that we would not be outwitted by Satan; for we are not ignorant of his designs.
2 Corinthians 11:3 ESV But I am afraid that as the serpent deceived Eve by his cunning, your thoughts will be led astray from a sincere and pure devotion to Christ.
2 Corinthians 11:13-14 ESV (13) For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ. (14) And no wonder, for even Satan disguises himself as an angel of light.
Luke 22:31 ESV "Simon, Simon, behold, Satan demanded to have you, that he might sift you like wheat,
1 Peter 5:8 ESV Be sober-minded; be watchful. Your adversary the devil prowls around like a roaring lion, seeking someone to devour.
THREE LEVELS OF WARFARE:
1. GROUND LEVEL WARFARE: Casting out demons, deliverance ministries. (See Mk.1:34, 39).
2. OCCULT LEVEL WARFARE: Witchcraft, sorcery, freemasonry, new age, astrology, Eastern religions. (See Acts 13:10-12).
3. STRATEGIC LEVEL WARFARE: Encounters with high-ranking principalities and powers which keep large numbers of people, regions, territories in spiritual bondage. (See Eph.6:12; Acts 19:21-41).