Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground, and after you have done everything, to stand
Until you are established (rooted and grounded) anything can come and uproot you! Mind you, the devil is only interested in one thing: to take you out of the Will of God! Whatever he does, that’s the ultimate mission! (John 10:10)
The full armour of God is bulletproof to all the assailants of the enemy in the evil day. Too many Christians don’t take this seriously. That’s why they end up getting clobbered in the head.
What is the armour of God? The larger context (Ephesians 6:14-17) answers that question. The armour has six parts: Belt of truth, the breastplate of righteousness, shoes of the gospel of peace, the shield of faith, helmet of salvation, the sword of the Spirit and the Word of God.