2:31-45 This image represented the kingdoms of the earth, that should successively rule the nations, and influence the affairs of the Jewish church. 1. The head of gold signified the Chaldean empire, then in being. 2. The breast and arms of silver signified the empire of the Medes and Persians. 3. The belly and thighs of brass signified the Grecian empire, founded by Alexander. 4. The legs and feet of iron signified the Roman empire. The Roman empire branched into ten kingdoms, as the toes of these feet. Some were weak as clay, others strong as iron. Endeavours have often been used to unite them, for strengthening the empire, but in vain. The stone cut out without hands, represented the kingdom of our Lord Jesus Christ, which should be set up in the kingdoms of the world, upon the ruins of Satan's kingdom in them. This was the Stone which the builders refused, because it was not cut out by their hands, but it is become the head stone of the corner. Of the increase of Christ's government and peace there shall be no end. The Lord shall reign, not only to the end of time, but when time and days shall be no more. As far as events have gone, the fulfilling this prophetic vision has been most exact and undeniable; future ages shall witness this Stone destroying the image, and filling the whole earth.
31. The world power in its totality appears as a colossal human form: Babylon the head of gold, Medo-Persia the breast and two arms of silver, Græco-Macedonia the belly and two thighs of brass, and Rome, with its Germano-Slavonic offshoots, the legs of iron and feet of iron and clay, the fourth still existing. Those kingdoms only are mentioned which stand in some relation to the kingdom of God; of these none is left out; the final establishment of that kingdom is the aim of His moral government of the world. The colossus of metal stands on weak feet, of clay. All man's glory is as ephemeral and worthless as chaff (compare 1Pe 1:24). But the kingdom of God, small and unheeded as a "stone" on the ground is compact in its homogeneous unity; whereas the world power, in its heterogeneous constituents successively supplanting one another, contains the elements of decay. The relation of the stone to the mountain is that of the kingdom of the cross (Mt 16:23; Lu 24:26) to the kingdom of glory, the latter beginning, and the former ending when the kingdom of God breaks in pieces the kingdoms of the world (Re 11:15). Christ's contrast between the two kingdoms refers to this passage.
a great image—literally, "one image that was great." Though the kingdoms were different, it was essentially one and the same world power under different phases, just as the image was one, though the parts were of different metals.