13. “The plains shall be joyful, and all things that are in them” (ver. 12). All the meek, all the gentle, all the righteous, are the “plains” of God. “Then shall all the trees of the woods rejoice.” The trees of the woods are the heathen. Why do they rejoice? Because they were cut off from the wild olive, and engraffed into the good olive. “Then shall all the trees of the woods rejoice:” because huge cedars and cypresses have been cut down, and undecaying timbers have been bought for the building of the house. They were trees of the woods; but before they were sent to the building: they were trees of the woods, but before they produced the olive.