As already observed, the tone changes with ver. 33, from which point onwards the psalmist adduces instances of Providential working of a different kind from those in the four vivid pictures preceding, and drops the refrains. In vv. 33-38 he describes a double change wrought on a land. The barrenness which blasts fertile soil is painted in language largely borrowed from Isaiah. "Ver. 33_a_ recalls Isa. l. 2_b_; ver. 33_b_ is like Isa. xxxv. 7_a_" (Delitzsch). The opposite change of desert into fertile ground is pictured as in Isa. xli. 18. The references in ver. 36 to "the hungry" and to "an inhabited city" connect with the previous part of the psalm, and are against the supposition that the latter half is not originally part of it. The incidents described refer to no particular instance, but are as general as those of the former part. Many a land, which has been blasted by the vices of its inhabitants, has been transformed into a garden by new settlers. "Where the Turks' horse has trod, no grass will grow." Ver. 39 introduces the reverse, which often befalls prosperous communities, especially in times when it is dangerous to seem rich for fear of rapacious rulers. "The pressure" referred to in ver. 39 is the oppression of such. If so, ver. 40, which is quoted from Job xii. 21, 24, though introduced abruptly, does not disturb the sequence of thought. It grandly paints the judgment of God on such robber-princes, who are hunted from their seats by popular execration, and have to hide themselves in the pathless waste, from which those who cry to God were delivered (vv. 41_b_ and 4_a_). On the other hand, the oppressed are lifted, as by His strong arm, out of the depths and set on high, like a man perched safely on some crag above high-water mark. Prosperity returning is followed by large increase and happy, peaceful family life, the chief good of man on earth. The outcome of the various methods of God's unvarying purpose is that all which is good is glad, and all which is evil is struck dumb. The two clauses of ver. 42, which describe this double effect, are quoted from two passages in Job--_a_ from xxii. 19, and _b_ from v. 16.