Having introduced this series as a guide to staving off those pesky demons, we continue by noting the Divine Reconnaissance we have from Ephesians 6:11–13.
It may be surprising to note that the first thing Paul explains in Ephesians 6 is that we are at war. It is dangerous to enter into combat without knowing the enemy, but God reveals everything that we need to know about the enemy in Scripture. The Apostle Paul begins his explanation of Spiritual warfare by giving a command to put on the full armor of God (4:11, 13). Verses 11–12 give the warrant for this command. The reason we need to put on God’s armor is because we are in a war with Satan and demonic powers whether we acknowledge it or not.
The Devil is chief among the demonic powers in the universe (11). He is described in Scripture as the ruler of the world (John 12:31; 14:30; 16:11). “[T]he whole world lies in the power of the evil one” notes the apostle John (1 John 5:19). He rules over the domain of darkness (Col 1:13), being the prince of the power of the air (Eph 2:2). In the beginning, he led a rebellion in heaven, taking with him one-third of the angelic beings God had created (Rev 12:4, 7–10). At the end of the rebellion he was cast down to earth (cf. Luke 10:17–18. Like the angels who fell with him, Satan deceived the human race so that the human race would follow him in rebellion (Gen 3). Now, he runs like a roaring lion to destroy God’s people (1 Pet 5:9; cf. Job 1–2). Because of this, it is reasonable to conclude that Satan is a powerful being who garners respect and authority over the fallen angels.
Scripture also teaches that even Archangels like Michael, who battled Satan over the body of Moses, knows well enough his power (Jude 9). Satan clearly has authority over demons. Paul describes the demonic horde as rulers, authorities and cosmic powers and spiritual forces of evil (Eph 6:12). These powers rule over the “this present darkness” (12). The world lies in darkness, being full of evil (Eph 5:8, 16). This is why Paul says, “Put on the whole armor of God, that you may be able to stand against the schemes of the devil” (Eph 6:11). One need not underestimate the powers of Satan.
For these reasons it is important to put on the armor of God. Paul reaffirms this in verse 13 after giving the warrant for this action in verses 11-12. It cannot be said enough times to our ages’ lethargic and careless believers. The armor of God must be worn because we are in a war with Satan and the demonic hordes. This divine reconnaissance is an impetus for the saints to arm themselves for battle.