Daniel 2:40-42

The fourth kingdom shall be strong as iron, &c.— This description agrees well with the Roman empire, and the event answered this prediction; for the Roman was vastly more strong and extensive than any of the preceding three. Daniel seems to divide it into three periods. The first is this kingdom, in its strongest and flourishing state, which seems to be denoted by the iron legs: the second is the same kingdom, weakened by the divided state of the empire, denoted by the feet, which were part of potter's clay, and part of iron; for which reason the prophet tells us, the kingdom shall be divided, though there should be in it something of the strength of iron, because the iron was mixed with the clay: the third is the same empire, in a yet farther state of declension, denoted by the toes, the extremity of the image; and of consequence the last period of this fourth empire. As the toes of the feet were part of iron, and part of clay, so the kingdom shall be partly strong, and partly broken; that is to say, one part of this divided empire shall remain, and the other part be entirely destroyed. And as the last period of this kingdom is denoted by the toes, this seems to intimate that the remaining part, which was not broken, should be divided into ten distinct kingdoms or governments. Florus, the Roman historian, points out to us this threefold period of the Roman empire, telling us, that it was in its highest strength and glory to the conclusion of the Numantine war, and might be named golden; thence to Marius and Sylla it became like iron; and was at last torn and devoured by the factions of Marius, Sylla, Caesar, and Pompey. Dr. Chandler's Vind. of Dan. p. 119.