(8) Paul’s instruction to put on the full armor of God is a command. During the Second World War, my father and many other men received a letter in the mail, that began something like this: “Greetings from the President of the United States.” That letter, as you may know, was notification of having been drafted into the military. The President’s “greeting” was not an invitation, it was a summons. One did not dare to ignore this letter, without expecting serious consequences.
Paul’s instructions concerning the spiritual war are similar, in that Paul is informing every Christian that they have been drafted, not to fight a physical war, but to fight a spiritual war. We are not encouraged to take up the “full armor of God,” we are commanded to do so. These verses are our marching orders, and we dare not ignore them, or fail to carry them out to the letter.
(9) Our protection against Satan’s attacks is assured only if and when we take up the full armor of God. Satan’s schemes are many, and he attacks us at any point he considers vulnerable. Thus, our armor must be complete. We cannot pick and choose our armor, but rather we must put all of it on. We must be completely equipped, or we are vulnerable to his attacks.
Paul’s emphasis on the “full” or “complete” armor of God in Ephesians chapter 6 teaches us something else, by implication. If we must put on the “full armor of God” in order to stand, then the armor of Ephesians chapter 6 must be the full or complete armor that we need. Why would Paul be so emphatic about putting on the full armor of God and then not tell us what all of that armor is. I would therefore conclude that we do not need any armor other than that found in Ephesians 6:10-20. I would also conclude that any “armor” which men might suggest in addition to God’s full armor is not necessary, and is indeed unnecessary.