Ephesians 6:10-18 (KJV) Finally, my brethren, be strong in the Lord, and in the power of his might.
Put on the whole armour of God, that ye may be able to stand against the wiles of the devil.
For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
Wherefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.
Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness;
And your feet shod with the preparation of the gospel of peace;
Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked.
And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;

This quote is by Ellen White
Thoughts from the mount of blessing
Pages 29,30
Joy in persecution
As men seek to come into harmony with God, they will find that the offense of the cross has not ceased. Principalities and power and wicked spirits in high places are arrayed against all who yield obedience to the law of heaven. Therefore so far from causing grief, persecution should bring joy to the disciples of Christ, for it is an evidence that they are following in the steps of the Master.