The head of this image was of fine gold, its chest and arms of silver, its middle and thighs of bronze,
Daniel here gives full satisfaction to Nebuchadnezzar concerning his dream and the interpretation of it. That great prince had been kind to this poor prophet in his maintenance and education; he had been brought up at the king's cost, preferred at court, and the land of his captivity had hereby been made much easier to him than to others of his brethren.
Commenting on Daniel 2:31-45
This image's head was of fine gold,.... The prophet begins with the superior part of this image, and descends to the lower, because of the order and condition of the monarchies it represents: this signifies the Babylonian monarchy, as afterwards explained; called the "head", being the first and chief of the monarchies; and compared to "fine gold", because of the glory, excellency, and duration of...
On ancient coins states are often represented by human figures. The head and higher parts signify the earlier times; the lower, the later times. The metals become successively baser and baser, implying the growing degeneracy from worse to worse. Hesiod, two hundred years before Daniel, had compared the four ages to the four metals in the same order; the idea is sanctioned here by Holy Writ.