doubt = Those who desire to doubt will have plenty of room.

"IMPACT OF THE WEIGHT OF EVIDENCE.----THOSE WHO DESIRE TO DOUBT WILL HAVE PLENTY OF ROOM. GOD DOES NOT PROPOSE TO REMOVE ALL OCCASION FOR UNBELIEF. HE GIVES EVIDENCE, WHICH MUST BE CAREFULLY INVESTIGATED WITH A HUMBLE MIND AND A TEACHABLE SPIRIT, AND ALL SHOULD DECIDE FROM THE WEIGHT OF EVIDENCE. GOD GIVES SUFFICIENT EVIDENCE FOR THE CANDID MIND TO BELIEVE; BUT HE WHO TURNS FROM THE WEIGHT OF EVIDENCE BECAUSE THERE ARE A FEW THINGS WHICH HE CANNOT MAKE PLAIN TO HIS FINITE UNDERSTANDING WILL BE LEFT IN THE COLD, CHILLING ATMOSPHERE OF UNBELIEF AND QUESTIONING DOUBTS, AND WILL MAKE SHIPWRECK OF FAITH." Testimonies Volume 5, 675, 676, 1889.The True Witness

"What greater deception can come upon human minds than a confidence that they are right when they are all wrong! The message of the True Witness finds the people of God in a sad deception, yet honest in that deception. They know not that their condition is deplorable in the sight of God. While those addressed are flattering themselves that they are in an exalted spiritual condition, the message of the True Witness breaks their security by the startling denunciation of their true condition of spiritual blindness, poverty, and wretchedness. The testimony, so cutting and severe, cannot be a mistake, for it is the True Witness who speaks, and His testimony must be correct.” - Ellen White, Testimonies for the Church, vol. 3, p.252.4

“I have been shown that the greatest reason why the people of God are now found in this state of spiritual blindness is that they will not receive correction. Many have despised the reproofs and warnings given them. The True Witness condemns the lukewarm condition of the people of God, which gives Satan great power over them in this waiting, watching time. The selfish, the proud, and the lovers of sin are ever assailed with doubts. Satan has ability to suggest doubts and to devise objections to the pointed testimony that God sends, and many think it a virtue, a mark of intelligence in them, to be unbelieving and to question and quibble. Those who desire to doubt will have plenty of room. God does not propose to remove all occasion for unbelief. He gives evidence, which must be carefully investigated with a humble mind and a teachable spirit, and all should decide from the weight of evidence.” – Ellen White, Testimonies for the Church, vol. 3, p. 255.1

Comments from Ellen White about her ministry timeline

1882 (reflecting back on the experiences of the 1840’s)

“In the providence of God the several Sabbathkeeping ministers who led out in teaching these new-found truths in company with a number of their followers, came together in 1848 in five Sabbath conferences. Through periods of fasting and prayer they studied the word of God. Elder Bates, the apostle of the Sabbath truth, took the lead in advocating the binding claims of the Sabbath. Hiram Edson and his associates, who attended some of the conferences, were strong in their presentation of the sanctuary light. James White, a careful student of prophecy, focused his attention on events that must take place before Jesus comes again. At these meetings the leading doctrines held today by Seventh-day Adventists were brought together.” {EW xxii.2}

Looking back to this experience, Ellen White wrote: {EW xxii.3}

“Many of our people do not realize how firmly the foundation of our faith has been laid. My husband, Elder Joseph Bates, Father Pierce, [Older brethren among the pioneers are here thus reminiscently referred to. “Father Pierce” was Stephen Pierce, who served in ministerial and administrative work in the early days.] Elder [Hiram] Edson, and others who were keen, noble, and true, were among those who, after the passing of the time in 1844, searched for the truth as for hidden treasure. I met with them, and we studied and prayed earnestly. Often we remained together until late at night, and sometimes through the entire night, praying for light and studying the Word. Again and again these brethren came together to study the Bible, in order that they might know its meaning, and be prepared to teach it with power. When they came to the point in their study where they said, “we can do nothing more,’ the Spirit of the Lord would come upon me, I would be taken off in vision, and a clear explanation of the passages we had been studying would be given me, with instruction as to how we were to labor and teach effectively. Thus light was given that helped us to understand the scriptures in regard to Christ, His mission, and His priesthood. A line of truth extending from that time to the time when we shall enter the city of God, was made plain to me, and I gave to others the instruction that the Lord had given me.” {EW xxii.4}

“During this whole time I could not understand the reasoning of the brethren. My mind was locked, as it were, and I could not comprehend the meaning of the scriptures we were studying. This was one of the greatest sorrows of my life. I was in this condition of mind until all the principal points of our faith were made clear to our minds, in harmony with the Word of God. The brethren knew that when not in vision, I could not understand these matters, and they accepted as light direct from heaven the revelations given.”—Selected Messages 1:206, 207. {EW xxiii.1}

“Thus the doctrinal foundation of the Seventh-day Adventist Church was laid in the faithful study of the Word of God, and when the pioneers could not make headway, Ellen White was given light that helped to explain their difficulty and opened the way for the study to continue. The visions also placed the stamp of God’s approval upon correct conclusions. Thus the prophetic gift acted as a corrector of error and a confirmer of truth.” {EW xxiii.2}

1892 – letter written to the Brethren of the General Conference, December 19, Melbourne, Victoria

“The work is soon to close. The members of the church militant who have proved faithful will become the church triumphant. In reviewing our past history, having travelled over every step of advance to our present standing, I can say, Praise God! As I see what God has wrought, I am filled with astonishment and with confidence in Christ as Leader. We have nothing to fear for the future, except as we shall forget the way the Lord has led us, and His teaching in our past history. We are now a strong people, if we will put our trust in the Lord; for we are handling the mighty truths of the word of God. We have everything to be thankful for. If we walk in the light as it shines upon us from the living oracles of God, we shall have large responsibilities, corresponding to the great light given us of God.” – Ellen White, General Conference Daily Bulletin, January 29, 1893, Art. B, par. 28

1903 – last fifty years (1853-1903)

“The enemy of souls has sought to bring in the supposition that a great reformation was to take place among Seventh-day Adventists, and that this reformation would consist in giving up the doctrines which stand as the pillars of our faith and engaging in a process of reorganization. Were this reformation to take place, what would result? The principles of truth that God in His wisdom has given to the remnant church would be discarded. Our religion would be changed. The fundamental principles that have sustained the work for the last fifty years would be accounted as error. A new organization would be established. Books of a new order would be written. A system of intellectual philosophy would be introduced. The founders of this system would go into the cities and do a wonderful work. The Sabbath, of course, would be lightly regarded, as also the God who created it. Nothing would be allowed to stand in the way of the new movement. The leaders would teach that virtue is better than vice; but God being removed, they would place their dependence on human power, which, without God, is worthless. Their foundation would be built on the sand, and storm and tempest would sweep away the structure.” – Ellen White Letter 242, October 1903, par. 13; also Selected Messages, book 1

1905 – last fifty years (1855-1905)

“We are to repeat the words of the pioneers in our work, who knew what it cost to search for the truth as for hidden treasure, and who labored to lay the foundation of our work. They moved forward step by step under the influence of the Spirit of God. One by one these pioneers are passing away. The word given me is, Let that which these men have written in the past be reproduced.” – Ellen White, Review & Herald, May 25, 1905, par. 21

“In the future, deception of every kind is to arise, and we want solid ground for our feet. We want solid pillars for the building. Not one pin is to be removed from that which the Lord has established. The enemy will bring in false theories, such as the doctrine that there is no sanctuary. This is the o the points on which there will be a departing from the faith. Where shall we find safety unless it be in the truths that the Lord has been giving for the last fifty years?” – Ellen White, Review & Herald, May 25, 1905, par. 28

1906 – looking back on 1844, 1845, 1846

“And now, after half a century of clear light from the Word as to what is truth, there are arising many false theories, to unsettle minds. But the evidence given in our early experience has the same force that it had then. The truth is the same as it ever has been, and not a pin or a pillar can be moved from the structure of truth. That which was sought for out of the Word in 1844, 1845, and 1846 remains the truth today in every particular.” — Ellen White, Letter 38, 1906

(It was in this three year period that the pillars of faith were established; 1844, 1845 and 1846.)

1906 – sixty years – 1846-1906

“I understood that some were anxious to know if Mrs. White still held the same views that she did years ago when they had heard her speak in the sanitarium grove, in the Tabernacle, and at the camp-meetings held in the suburbs of Battle Creek. I assured them that the message she bears today is the same that she has borne during the sixty years of her public ministry. She has the same service to do for the Master that was laid upon her in her girlhood. She receives lessons from the same Instructor. The directions given her are, “Make known to others what I have revealed to you. Write out the messages that I give you, that the people may have them.” This is what she has endeavored to do.” – Ellen White, Review & Herald, July 26, 1906, par. 20

(This is Sister White talking about herself using what is called third person language or technique. The same grammatical term as Jesus speaking about himself as the Son of Man, the Spirit of Truth, and in the context of the Comforter)