Revelation 12:17 (New International Version) "Then the dragon (Satan) was enraged ... and went off to make war against ... those who obey God's commandments and hold to the testimony of Jesus."
2 Peter 1:3 (New International Version) "His divine power has given us everything we need for life and godliness through our knowledge of him who called us by his own glory and goodness."
Isaiah 55:11 (New King James Version) "So shall My word be that goes forth from My mouth; It shall not return to Me void, but it shall accomplish what I please, and it shall prosper in the thing for which I sent it."
Ephesians 6:10-18 (New International Version)
"Finally, be strong in the Lord and in his mighty power. Put on the full armor of God so that you can take your stand against the devil's schemes. For our struggle is ... against the powers of this dark world and against the spiritual forces of evil in the heavenly realms. Therefore put on the full armor of God, so ... you may be able to stand your ground, and after you have done everything, to stand. Stand firm then, with the belt of truth buckled around your waist, with the breastplate of righteousness in place, and with your feet fitted with the readiness that comes from the gospel of peace... take up the shield of faith, with which you can extinguish all the flaming arrows of the evil one. Take the helmet of salvation and the sword of the Spirit, which is the word of God. And pray in the Spirit (speaking in tongues) on all occasions with all kinds of prayers and requests. With this in mind, be alert and always keep on praying for all the saints. "
We've been given Spiritual Gifts and The Armor of God for defense.
The helmet was a piece of armor that protected the Roman soldier against deadly blows to the head. What the helmet was to the Roman soldier, salvation is to the Christian soldier. There can be no victory unless the mind is protected with God’s Word. Romans 8:6 says, “For to be carnally minded is death; but to be spiritually minded is life and peace.” As Christians, the battlefield is in the area of our minds. We must be careful to protect our minds from wrong thinking and be transformed by the renewing of our minds (Romans 12:2). Every thought can be brought captive to the obedience of Jesus Christ (2 Corinthians 10:4-5).
(Andrew Wommack's Living Commentary)
The “sword of the Spirit” is our only offensive weapon. In battle, defense is a great asset to any warrior. This piece of armor has the ability to cut, wound, and hurt our Enemy, the devil.
The Greek word used here is “RHEMA,” and it literally means a spoken word–specifically, a spoken word appropriate for your situation. It’s not the Bible lying on your coffee table that makes the Enemy flee; it is the Word of God hidden in your heart, activated by the power of the Holy Spirit, and spoken in an appropriate situation. Jesus said in John 6:63–“The words that I speak unto you, they are spirit, and they are life.” The words we speak that come from the written Word of God are empowered by the Holy Spirit. The Word by itself doesn’t make us free. It is the Word we know and speak that will deliver us (John 8:32).
The Word of God is effective because it has authority. God’s Word supersedes all authority of the church, of reason, of intellect, and even of Satan himself.
The Holy Spirit wields this Word as it is spoken in faith. Speaking God’s Word in faith brings the Holy Spirit into action. In Luke 4, when Jesus was tempted of the devil for forty days, it was “the sword of the Spirit,” the Word of God, that Jesus used to defeat the Enemy during His temptation. Likewise, Christian soldiers must avail themselves of God’s Word by placing it in their hearts so that the Holy Spirit may bring it forth at the appropriate time to accomplish a complete and total victory.
(Andrew Wommack's Living Commentary)
A great resource on the significance of our Spiritual Armor is the book "Dressed to Kill" by Rick Renner.
Hebrews 12:1 (The Living Bible) "Since we have such a huge crowd of men of faith watching us from the grandstands, let us strip off anything that slows us down or holds us back, and especially those sins that wrap themselves so tightly around our feet and trip us up; and let us run with patience the particular race that God has set before us."
God made some HUGE promises to Abram whose name meant "Father of Many."
Abraham obeyed God and waited for God to fulfill His promises.
... Years passed.
God changed Abram's name to Abraham which meant "Father of Many Nations."
Abraham and Sarah remained childless. Sarah was past childbearing age.
... Years passed.
Abraham TRUSTED God.
He LOOKED at the stars and FINGERED through the sand...
He BELIEVED God kept His promises. He was FULLY PERSUADED in God's power.
He could "PICTURE IT DONE."
He BELIEVED God would call into being things that were not -- Sarah was barren and past childbearing age.
He IMAGINED the impossible -- "so shall your offspring be."
He DID NOT WAIVER with unbelief.
He PRAISED God and gave Him glory.
He SPOKE of future events with as much certainty as though they were already past.
He gives us an example of having and ACTIVE FAITH in God.
God declared Abraham righteous because of his ACTIVE FAITH.
We too can trust God.
We can hold tight onto God's promises in scripture.
We can speak of future events with as much certainty as though they were already past.
Faith says, "Picture It Done."
Hebrews 11:1-3 (The Amplified Bible) "NOW FAITH is the assurance (the confirmation, the title deed) of the things [we] hope for, being the proof of things [we] do not see and the conviction of their reality [faith perceiving as real fact what is not revealed to the senses] ... By faith we understand that the worlds [during the successive ages] were framed (fashioned, put in order, and equipped for their intended purpose) by the word of God, so that what we see was not made out of things which are visible."
Romans 4:16-22 (NIV) Therefore, the promise comes by faith, so that it may be by grace and may be guaranteed to all Abraham’s offspring … As it is written: “I have made you a father of many nations.” He is our father in the sight of God, in whom he believed—the God who gives life to the dead and calls into being things that were not. Against all hope, Abraham in hope believed and so became the father of many nations, just as it had been said to him, “So shall your offspring be.” Without weakening in his faith, he faced the fact that his body was as good as dead—since he was about a hundred years old—and that Sarah’s womb was also dead. Yet he did not waver through unbelief regarding the promise of God, but was strengthened in his faith and gave glory to God, being fully persuaded that God had power to do what he had promised. This is why “it was credited to him as righteousness.”