It springs from the moral sense. Other races have arrived at a conception of the universe along other lines: some by the observation of physical laws valid to the recesses of space; some by logic and the unity of Reason. But Israel found the universe through the conscience. It is a historical fact that the Unity of God, the Unity of History and the Unity of the World, did, in this order, break upon Israel, through conviction and experience of the universal sovereignty of righteousness. We see the beginnings of the process in Amos. To him the sequences which work themselves out through history and across nature are moral. Righteousness is the hinge on which the world hangs; loosen it, and history and nature feel the shock. History punishes the sinful nation. But nature, too, groans beneath the guilt of man; and in the Drought, the Pestilence and the Earthquake provides his scourges. It is a belief which has stamped itself upon the language of mankind. What else is "plague" than "blow" or "scourge"? This brings us to the second point--our prophet's treatment of Nature. Apart from the disputed passages (which we shall take afterwards by themselves) we have in the Book of Amos few glimpses of nature, and these always under a moral light. There is not in any chapter a landscape visible in its own beauty. Like all desert-dwellers, who when they would praise the works of God lift their eyes to the heavens, Amos gives us but the outlines of the earth--a mountain range,[367] or the crest of a forest,[368] or the bare back of the land, bent from sea to sea.[369] Nearly all his figures are drawn from the desert--the torrent, the wild beasts, the wormwood.[370] If he visits the meadows of the shepherds, it is with the terror of the people's doom;[371] if the vineyards or orchards, it is with the mildew and the locust;[372] if the towns, it is with drought, eclipse and earthquake.[373] To him, unlike his fellows, unlike especially Hosea, the whole land is one theatre of judgment; but it is a theatre trembling to its foundations with the drama enacted upon it. Nay, land and nature are themselves actors in the drama. Physical forces are inspired with moral purpose, and become the ministers of righteousness. This is the converse of Elijah's vision. To the older prophet the message came that God was not in the fire nor in the earthquake nor in the tempest, but only in the still small voice. But to Amos the fire, the earthquake and the tempest are all in alliance with the Voice, and execute the doom which it utters. The difference will be appreciated by us, if we remember the respective problems set to prophecy in those two periods. To Elijah, prophet of the elements, wild worker by fire and water, by life and death, the spiritual had to be asserted and enforced by itself. Ecstatic as he was, Elijah had to learn that the Word is more Divine than all physical violence and terror. But Amos understood that for his age the question was very different.