“13 These have one mind, and shall give their power and strength unto the beast. 14 These shall make war with the Lamb, and the Lamb shall overcome them: for he is Lord of lords, and King of kings: and they that are with him are called, and chosen, and faithful. ”
Revelation 17:13-14 KJV

“In the seventeenth of Revelation is foretold the destruction of all the churches who corrupt themselves by idolatrous devotion to the service of the papacy, those who have drunk of the wine of the wrath of her fornication. [Revelation 17:1-4 quoted.]
Thus is represented the papal power, which with all deceivableness of unrighteousness, by outside attraction and gorgeous display, deceives all nations; promising them, as did Satan our first parents, all good to those who receive its mark, and all harm to those who oppose its fallacies. The power which has the deepest inward corruption will make the greatest display, and will clothe itself with the most elaborate signs of power. The Bible plainly declares that this covers a corrupt and deceiving wickedness. “Upon her forehead was a name written, Mystery, Babylon the Great, The Mother of Harlots and Abominations of the Earth.”
What is it that gives its kingdom to this power? Protestantism, a power which, while professing to have the temper and spirit of a lamb and to be allied to Heaven, speaks with the voice of a dragon. It is moved by a power from beneath (Letter 232, 1899).
13, 14 (chs. 13:11-17; 16:13-16). A Confederacy of Satan’s Forces—[Revelation 17:13, 14 quoted.] “These have one mind.” There will be a universal bond of union, one great harmony, a confederacy of Satan’s forces. “And shall give their power and strength unto the beast.” Thus is manifested the same arbitrary, oppressive power against religious liberty, freedom to worship God according to the dictates of conscience, as was manifested by the papacy, when in the past it persecuted those who dared to refuse to conform with the religious rites and ceremonies of Romanism.
In the warfare to be waged in the last days there will be united, in opposition to God’s people, all the corrupt powers that have apostatized from allegiance to the law of Jehovah. In this warfare the Sabbath of the fourth commandment will be the great point at issue; for in the Sabbath commandment the great Lawgiver identifies Himself as the Creator of the heavens and the earth”(Manuscript 24, 1891 7BC 983.3 – 7BC 983.7