But why does the prophet mention gold and silver? He did this in conformity with what was usual and common; for whenever the Prophets speak of the kingdom of Christ, they delineate or describe its splendor in figurative terms, suitable to their own age. When Isaiah foretells the restoration of the Church, he declares that the Church would be all gold and silver, and whatever glittered with precious stones; and in Isaiah 60:1 he especially sets forth the magnificence of the Temple, as though nations from all parts were to bring for sacrifice all their precious things. But Isaiah speaks figuratively, as all the other Prophets do. So then what we read of gold and of silver ought to be so explained as to be applied mystically to the kingdom of Christ; as we have already observed respecting Malachi 1:11—