Have a look at this dream below. It's by Ellen White who related it exactly 116 years ago today where God answers her prayers for the remnant and confirms and glorifies His truth. Notice in the dream that there is a large assembly of Adventists and some non-Adventists. This assembly is then divided. She only addresses a few in this large assembly, apparently the members of a subgroup who were in great danger of being mislead into error but who were willing to listen. She prays for them and her prayer is granted. This is another assurance direct from the Lord that every believer that clings to the truth will triumph with it:

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The past night, December 1, was to me one of great experience. I seemed to be in a meeting where there were a large number assembled?many believers and some unbelievers. On one occasion the company was divided into several smaller companies. I had a special burden and had addressed my remarks to some few under the temptations of the enemy. They were entertaining ideas that were not sound but would lead them into the denying of the truth. This present time in which we live is a period of great temptation to give heed to erroneous sentiments and suggestions of seducing spirits and to link up with evil angels and present the same as present truth. There was a deep interest manifested in searching the Scriptures. {Ms177-1903.1}

I had a special burden of prayer, and the peril of souls seemed to me so great upon my soul. I poured out the burden of my soul unto the Lord. I was pleading most earnestly for the Lord to break the power of the enemy and set us free, to let the minds of the beloved ones who are tempted go free, and to let the precious truth shine forth amid the moral darkness. I presented my prayer to the Lord that He would come forth to the help of His people and magnify the truth, that those who were uninformed would not be deceived in this period of great peril. I presented before the Lord our great need of special help to be granted to His people in accordance with the consistency of His attributes to work in our behalf and answer our prayers to glorify His own name. I was reaching higher and still higher, pleading with God to comply with our earnest supplications and let His truth at this time appear in all its dignity and beauty and saving grace, as He had often made known His special love and His special power and made the truth appear in its strength and its authority?to make known again His clear and sacred truth unmixed with chaff, which was dangerous to the flock of God. I pleaded, and I felt that the Lord had pledged Himself. Victory came in, and I awoke crying aloud in joy that the Lord had manifested to us His grace, His truth, and His salvation. I learned from the members of my family that my praying was aloud in my sleep. {Ms177-1903.2}