The question of the identification of these successive monarchies does not fall to be discussed here. But I may observe that the definite statement of verse 44 ('in the days of these kings') seems to date the rise of the everlasting kingdom of God in the period of the last of the four, and therefore that the old interpretation of the fourth kingdom as the Roman seems the most natural. The force of that remark may, no doubt, be weakened by the consideration that the Old Testament prophets' perspective of the future brought the coming of Messiah into immediate juxtaposition with the limits of their own vision; but still it has force.
The allocation of each part of the symbol is of less importance for us than the lessons to be drawn from it as a whole. But the singular amalgam of iron and clay in the fourth kingdom is worth notice. No sculptor or metallurgist could make a strong unity out of such materials, of which the combination could only be apparent and superficial. The fact to which it points is the artificial unity into which the great conquering empires of old crushed their unfortunate subject peoples, who were hammered, not fused, together. 'They shall mingle themselves with the seed of men' (ver. 43), may either refer to the attempts to bring about unity by marriages among different races, or to other vain efforts to the same end. To obliterate nationalities has always been the conquering despot's effort, from Nebuchadnezzar to the Czar of Russia, and it always fails. This is the weakness of these huge empires of antiquity, which have no internal cohesion, and tumble to pieces as soon as some external bond is loosened. There is only one kingdom which has no disintegrating forces lodged in it, because it unites men individually to its king, and so binds them to one another; and that is the kingdom which Nebuchadnezzar saw in its destructive aspect.
II. So we have now to think of the stone cut out without hands.
Three things are specified with regard to it: its origin, its duration, and its destructive energy. The origin is heavenly, in sharp contrast to the human origin of the kingdoms symbolised in the colossal man. That idea is twice expressed: once in plain words, 'the God of heaven shall set up a kingdom'; and once figuratively as being cut out of the mountain without hands. By the mountain we are probably to understand Zion, from which, according to many a prophecy, the Messiah King was to rule the earth (Ps. ii.; Isa. ii. 3).
The fulfilment of this prediction is found, not only in the supernatural birth of Jesus Christ, but in the spread of the gospel without any of the weapons and aids of human power. Twelve poor men spoke, and the world was shaken and the kingdoms remoulded. The seer had learned the omnipotence of ideas and the weakness of outward force. A thought from God is stronger than all armies, and outconquers conquerors. By the mystery of Christ's Incarnation, by the power of weakness in the preachers of the Cross, by the energies of the transforming Spirit, the God of heaven has set up the kingdom. 'It shall never be destroyed.' Its divine origin guarantees its perpetual duration. The kingdoms of man's founding, whether they be in the realm of thought or of outward dominion, 'have their day, and cease to be,' but the kingdom of Christ lasts as long as the eternal life of its King. He cannot die any more, and He cannot live discrowned. Other forms of human association perish, as new conditions come into play which antiquate them; but the kingdom of Jesus is as flexible as it is firm, and has power to adapt to itself all conditions in which men can live. It will outlast earth, it will fill eternity; for when He 'shall have delivered up the kingdom to His Father,' the kingdom, which the God of heaven set up, will still continue.