12. And I will lay thy windows with pearls. By these metaphors he shows that the condition of the Church, as has been formerly said, will be far better than at any former period. The Church is compared to a building, which is customary in every part of Scripture. (Jeremiah 24:6; Matthew 16:18.) For this reason he now draws a picture of a costly and magnificent structure. But it ought to be remarked, that the Prophet represents God as the architect of this building; for this work ought to be entirely ascribed to him alone.
But it may be asked what the Prophet means by “carbuncles, sapphires, pearls,” and other kinds of jewels; for by a similar metaphor Paul meant doctrine. “As a wise architect,” says he, “I have laid the foundation.” And again,
“If any man build on this foundation, gold, silver, precious stones, wood, hay, stubble, every man’s work shall be made manifest.” (1 Corinthians 3:10)
Whether or not this be the Prophet’s meaning, will appear from the following verse.