The agency of the Holy Spirit is to combine with human effort and all heaven is engaged in the work of preparing a people to stand in these last days. The end is near and we want to keep the future world in view.... 3SM 425.2
In this last conflict the Captain of the Lord's host [Joshua 5:15] is leading on the armies of heaven and mingling in the ranks and fighting our battles for us. We shall have apostasies, we expect them. “They will go out from us because they were not of us” (see 1 John 2:19). “Every plant, which my heavenly Father hath not planted, shall be rooted up” (Matthew 15:13). 3SM 425.3
The angel, the mighty angel from heaven, is to lighten the earth with His glory (Revelation 18:1), while he cries mightily with a loud voice, “Babylon the great is fallen, is fallen” (Verse 2).... We would lose faith and courage in the conflict, if we were not sustained by the power of God. 3SM 425.4
Every form of evil is to spring into intense activity. Evil angels unite their powers with evil men, and as they have been in constant conflict and attained an experience in the best modes of deception and battle and have been strengthening for centuries, they will not yield the last great final contest without a desperate struggle and all the world will be on one side or the other of the question. 3SM 425.5
The battle of Armageddon will be fought. And that day must find none of us sleeping. Wide awake we must be, as wise virgins having oil in our vessels with our lamps. The power of the Holy Ghost must be upon us and the Captain of the Lord's host will stand at the head of the angels of heaven to direct the battle. Solemn events before us are yet to transpire. Trumpet after trumpet is to be sounded; vial after vial poured out one after another upon the inhabitants of the earth. Scenes of stupendous interest are right upon us and these things will be sure indications of the presence of Him who has directed in every aggressive movement, who has accompanied the march of His cause through all the ages, and who has graciously pledged Himself to be with His people in all their conflicts to the end of the world. He will vindicate His truth. He will cause it to triumph. He is ready to supply His faithful ones with motives and power of purpose, inspiring them with hope and courage and valor in increased activity as the time is at hand. 3SM 426.1
One Fierce Last Struggle—Deceptions, delusions, impostures will increase. The cries will come in from every quarter, “Lo, here is Christ! Lo, there is Christ!” “But,” said Christ, “Go ye not ... after them” (Luke 21:8). There will be one fierce struggle before the man of sin shall be disclosed to this world—who he is and what has been his work. 3SM 426.2
While the Protestant world is becoming very tender and affectionate toward the man of sin (2 Thessalonians 2:3), shall [not] God's people take their place as bold and valiant soldiers of Jesus Christ to meet the issue which must come, their lives hid with Christ in God? Mystic Babylon has not been sparing in the blood of the saints and shall we [not] be wide awake to catch the beams of light which have been shining from the light of the angel who is to brighten the earth with his glory.—Letter 112, 1890. 3SM 426.3