Location of Three Messages Divinely Fixed
"The proclamation of the first, second, and third angels' messages has been located by the word of Inspiration. Not a peg or pin is to be removed. No human authority has any more right to change the location of these messages than to substitute the New Testament for the Old. The Old Testament is
the gospel in figures and symbols. The New Testament is the substance. One is as essential as the other.
The first and second messages were given in 1843 and 1844, and we are now under the proclamation of the third; but all three of the messages are still to be proclaimed. It is just as essential now as ever before that they shall be repeated to those who are seeking for the truth. By pen and voice we are to sound the proclamation, showing their order, and the application of the prophecies that bring us to the third angel's message. There cannot be a third without the first and second.
And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people, saying with a loud voice, Fear God, and give glory to Him; for the hour of His judgment is come: and worship Him that made heaven, and earth, and the sea, and the fountains of waters.
Revelation 14:6,7.
In history and prophecy the word of God portrays the long-continued conflict between truth and error. That conflict is yet in progress. Those things which have been will be repeated. Old controversies will be revived, and new theories will be continually arising.
*But God's people, who in their belief and fulfillment of prophecy have acted a part in the proclamation of the first, second, and third angels' messages, know where they stand."
Ellen G. White MS 32,1896