“In a special sense Seventh-day Adventists have been set in the world as watchmen and light-bearers. To them has been entrusted the last warning for a perishing world. On them is shining wonderful light from the Word of God. They have been given a work of the most solemn import,—the proclamation of the first, second, and third angels’ messages. There is no other work of so great importance. They are to allow nothing else to absorb their attention.”—Testimonies for the Church 9:19 (1909). {LDE 45.3}

The last rays of merciful light, the last message of mercy to be given to the world, is a revelation of His character of love. The children of God are to manifest His glory. In their own life and character they are to reveal what the grace of God has done for them.” {COL 415.5}

The First Angel’s Message reads: “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 14:7

If “him” or “his” in Revelation 14:7 is referring to the three persons of the Trinity, then you would also have to assume that the writer (John) believed that three persons make a single being (in order to have used the pronouns as he did). Suffice to say, this was not the case.

This is the same John who also wrote, “And this is life eternal, that they might know thee the only true God [referring to the Father], and Jesus Christ, whom thou hast sent.” John 17:3.

If one is to proclaim the Three Angels’ Messages, it stands to reason that he or she ought to know who this “God” is that we ought to fear, give glory to, and worship. This is to be the foundation for the subsequent angels’ (second and third) messages that would follow.

“The Three Angels’ Messages—The proclamation of the first, second, and third angels’ messages has been located by the word of Inspiration. NOT A PEG OR A 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 Old Testament presents lessons from the lips of Christ, and these lessons have not lost their force in any particular. 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. These messages we are to give to the world in publications, in discourses, showing in the line of prophetic history the things that have been, and the things that will be.”—Manuscript 32, 1896. {CW 26.2}