Satanic agencies in human form will take part in this last great conflict to oppose the building up of the kingdom of God. And heavenly angels in human guise will be on the field of action. The two opposing parties will continue to exist till the closing up of the last great chapter in this world's history.—The Review and Herald, August 5, 1909. TA 261.1
Satan will use every opportunity to seduce men from their allegiance to God. He and his evil angels who fell with him will appear on the earth as men, seeking to deceive. God's angels also will appear as men, and will use every means in their power to defeat the purposes of the enemy. We have a part to act.—Manuscript Releases 8:399. TA 261.2
Satan brings all his powers to the assault in the last, close conflict, and the endurance of the follower of Christ is taxed to the utmost. At times it seems that he must yield. But a word of prayer to the Lord Jesus goes like an arrow to the throne of God, and angels of God are sent to the field of battle. The tide is turned.—In Heavenly Places, 297. TA 261.3
In the closing period of earth's history the Lord will work mightily in behalf of those who stand steadfastly for the right.... Angels that excel in strength will protect them.—Prophets and Kings, 513. TA 262.1