Having once formulated his idea, he made it more general in order to apply it to the history of all nations.
The source of Roman equity was the fertile theory of natural law, or the law common to all nations.
In the spring of 323 he moved down to Babylon, receiving on the way embassies from lands as far as the confines of the known world, for the eyes of all nations were now turned with fear or wonder to the figure which had appeared with so superhuman an effect upon the world's stage.
He will soon shake all nations and their choicest gifts will be brought to adorn His house.
In thus looking forward to a shaking of all nations Haggai agrees with earlier prophecies, especially Isa.