If she [be] a wall,.... Built upon a sure foundation; and firmly established in her faith on Christ, and love to him; and is constant therein, and stands as a wall against the attacks of enemies ;we will build upon her a palace of silver; though at first but as a side wall, yet should become a complete habitation, even a palace for Christ, the King of kings, and, being designed for so illustrious an inhabitant, should be a "silver" one, denoting its worth, value, and splendour; the builders of it are the church and her ministers; though Christ is the principal builder, Zec 6:12.
Or, "a tower of silver" , signifying, that she should be well fortified, and be put into a posture of defence against her enemies: the Gentile church at first had but a very small appearance of a building, a foundation just laid, a side wall erected; but, in a short time, a noble structure, a stately tower, a silver palace, were built for God;and if she [be] a door, we will enclose her with boards of cedar; if the door of the Gospel was opened among the Gentiles, it should be succeeded to the building a holy temple to the Lord; which should be not only ornamented, but so well fenced, that it should not be in the power of their enemies to deface and demolish it: or if the door of their hearts was opened, to receive Christ, and his glorious train of grace, they should be adorned and beautified with a larger measure of them; or if being come into a church state, and the door of it was set open to receive good men, and exclude bad men, this would be to their honour comfort and safety: or this phrase is expressive of the finishing of the building, the gate or door being set up; though it rather seems to intend the low and mean estate of the Gentile church at first, when there was but little appearance of a building, only a door set up; which afterwards grew up into a stately and magnificent palace, like that of Solomon's, built of cedar boards of the wood of Lebanon; which may denote her fragrancy, perpetuity, and incorruptibleness.
So Ajax is called the wall of the Grecians, Homer. Iliad. 6. v. 5. & 7. v. 211.