Summary: Notice that the full armor of God that Paul had outlined for every Christian is complete but without back covers meaning to say that a Christian warrior is designed to always equipped to advance, and never given instruction to back down, retreat or surrender.
The Bible teaches, from beginning to end, of the existence of the invisible world, the world of the spirit. A world of angels and demons, yet a world that we touch daily as those who have been given not merely a body, but a spirit. This invisible world is difficult to believe in for many of us today. We tend to focus on that which our senses tell us is real. Things we can touch, taste, smell, hear, or see are real to us. An invisible world of the spirit seems a bit unreal or mystical.
One of the things I love about the way God’s Word presents the things of the spirit, is the way it stays away from the mystical or unreal. It presents the unseen world as simply a matter-of-fact. There are things that are seen; there are things that are unseen. Both are real. One is not more real than the other. The invisible world is not a matter of myth but of solid, well-grounded reality.
Jesus had a firm grasp of this reality. He was aware of and interacted with this invisible world on a regular basis. After His baptism, Jesus went into the wilderness for forty days of prayer and fasting. During this time He encountered the Devil and was faced with a time of temptation. The battle is not presented with a flourish as if to say, “This was a unique, once-for-all battle reserved only for the Son of God.” Instead, it almost seems as though it is a model of what may happen to any believer who makes a decision to follow at all costs, the direction of God. At any rate, the battle in the wilderness was not waged with miraculous signs, but with a clear-headed use of the Word of God to counter the suggestions of the Enemy.
As Jesus moved through His years of ministry in His earthly body, He encountered the invisible realm a number of times. There was the time He was preparing to go to Jerusalem and Peter spoke up against the trip. Jesus turned to him, and we can almost see Him pointing His finger in Peter’s direction as He said, “Get behind Me Satan.”
How unnerving that must have been for Simon Peter! I don’t believe Jesus was calling Peter, “Satan,” but rather was responding to Satan himself. Jesus understood how Satan could put words into the mouths of others, like Peter, and simply went to the root of the problem with His rebuke. By the way, if Satan could put his thoughts into the mind of the Apostle Peter, do you suppose he can do the same to us? I’m convinced that one of the major reasons for the many commands given in Scriptures regarding watching what we say, is the possibility that our words, unchecked, may contain the thoughts of the Enemy.
This we should know. This we should be convince of the spiritual world...
13- Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:
14-That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;
15- But speaking the truth in love, may grow up into him in all things, which is the head, even Christ: (Ephesians 4 KJV)
The armor is just a graphic way of saying what Paul says in Romans 13:14, “But put on the Lord Jesus Christ, and make no provision for the flesh in regard to its lusts.” In other words, Christ Himself is our armor. He is the belt of truth (John 14:6). He is our breastplate of righteousness (2 Cor. 5:21). He is the gospel of peace that we stand on (Eph. 2:13-14, 17). He is the shield of our faith (Heb. 12:2). He is our helmet of salvation (Titus 3:6). He is our sword, the word of God (John 1:1). He is our full armor, capable of protecting us from every onslaught of the devil. Putting on God’s armor means that in every trial and temptation by faith you appropriate Christ’s strength in place of your weakness. By faith you cry out to Him for deliverance and strength to persevere. By faith you rely on His promises, even as Jesus defeated Satan by quoting Scripture (Luke 4:1-13).
Most Christians have forgotten that the Christian life is not a playground, but a battlefield. As a result, very few of the Lord's people are armed, equipped and ready to wage spiritual battle. Whether we ever believe it or not, we are engaged in spiritual warfare. If we are to be successful in our work for the Lord Jesus, then we must be prepared for that battle and be ready to go to war.