What is an Armour?
An Armour is a protective covering that is used to prevent damage from being inflicted to an object, individual, or vehicle by direct contact weapons or projectiles, usually during combat, or from damage caused by a potentially dangerous environment or action (wikipedia).
Armours are won on certain (essential) part of the body to protect those vital parts from getting injured. For example:
Helmets are to protect the head,
Breastplates are to protect the internal organs like heart, lungs, liver, kidneys and so on.
The shod is also required to protect the feet from injuries (by the feet a soldier can advance or retreat in battle
and the shield, which assures a double protection for the armour bearer. With his weapon (for example; sword) in hand, the armour bearer is ready for battle
The last but not the least, the Belt; which ensures the soldier's protectives are firmly put in place, no saggy clothes on the battle field and no distraction of any kind from the personal protective equipment.
Any missing piece from these personal protectives will mean vulnerability of the soldier. The more missing Armour the more vulnerable the solder is.
Now let us look at what the bible says in the book of Ephesians 6:10-18 NKJV about prepations for battle against the greatest adversary of humanity since the beginning of the world;
10 Finally, my brethren, be strong in the Lord and in the power of His might.
11 Put on the whole armor of God, that you may be able to stand against the wiles of the devil.
12 For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places.
13 Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand.
14 Stand therefore, having girded your waist with truth, having put on the breastplate of righteousness,
15 and having shod your feet with the preparation of the gospel of peace;
16 above all, taking the shield of faith with which you will be able to quench all the fiery darts of the wicked one.
17 And take the helmet of salvation, and the sword of the Spirit, which is the word of God;
18 praying always with all prayer and supplication in the Spirit, being watchful to this end with all perseverance and supplication for all the saint.
There has been a great controversy (where the devil is wagging war against the host of heaven) since the beginning of this world. The moment we make up our mind to be on the Lord's side, then the devil begin to wage war against us as well.
Verse 12 of Ephesians 6 clearly describe the kind of forces and power that battles with the Christians. Hence, the need to make adequate preparations before the devil will bring us down.
At all times we have to gird our waist with truth. That is; we should always stay sincere and all our dealing with God and our fellow human beings must always be true. Satan often time uses lies that seems so insignificant to ungird us as Christians so that he will strike us from that weak point. Please gird yourself with truth always.
The Breastplates of righteousness must always be put on. Righteousness is the quality of being morally right and justifiable. The 10 commandments must always be kept and this is synonymous to righteousness. You must Love your God and you must Love your neighbor as yourself.
Gospel of peace on our feet is so important in waging war against the devil. The more soldiers you have the greater your arm-forces. How then do you increase your army? By preaching the Gospel. Gospel of peace cannot just be done on a spot, you have to move about to spread the Gospel. The more souls you bring to the Lord's side the thinner the power and forces of the devil.
The shield ensures double protection, you have Armour on your body yet you still have shield to protect you. The shield can also be used as a weapon. A skillful soldier will apply power to the shield while he uses it to hit the foe on the head. Faith is the shield. But faith you will tell a mountain to move and it will obey (faith as a weapon). Without faith it is impossible to please God.
Helmet of Salvation means deliverance from sin and its consequences, believed by Christians to be brought about by faith in Christ. It also means preservation or deliverance from harm, ruin, or loss. The helmet protects the Head, the home seat of both evil and good thought (which means the great controversy happens most in our heaf and in our thoughts). Putting on salvations means; you are completely delivered from sin and its consequences.
After all the above are put in place then you need the greatest weapon to fight the principalities and power. The weapon is the sword of the spirit and this means the Word of God. How was the devil defeated in heaven before he was casted to the earth? (They overcame the devil by the blood of the Lamb and by the WORDS of their testimony REVELATION 12:11).
Pray always, be watchful and persevere, the Lord God almight will give us Victory of Satan and his legions.