Protestant America will have formed an image of the Roman hierarchy

When the leading churches of the United States, uniting upon such points of doctrine as are held by them in common, shall influence the state to enforce their decrees and to sustain their institutions, then Protestant America will have formed an image of the Roman hierarchy, and the infliction of civil penalties upon dissenters will inevitably result.

The beast with two horns “causeth [commands] all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads: and that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.” Revelation 13:16, 17. The third angel's warning is: “If any man worship the beast and his image, and receive his mark in his forehead, or in his hand, the same shall drink of the wine of the wrath of God.” “The beast” mentioned in this message, whose worship is enforced by the two-horned beast, is the first, or leopardlike beast of Revelation 13—the papacy. The “image to the beast” represents that form of apostate Protestantism which will be developed when the Protestant churches shall seek the aid of the civil power for the enforcement of their dogmas. The “mark of the beast” still remains to be defined.

Great Controversy, p. 445.