Thou hast set all the borders of the earth,.... Of the whole world, and each of the nations, as of the land of Canaan, so of others, Deu 32:8, and even has fixed and settled the bounds of every man's habitation, Act 17:26, thou hast made summer and winter; see Gen 8:22, which, taken literally, are great benefits to the world; and, figuratively understood, may represent the two dispensations of the law and Gospel; see Sol 2:11, and the different frames of God's people when under temptations, and clouds, and darkness, and when they enjoy peace and comfort; and the different state of the church, when affected with affliction, persecution, false doctrine, deadness, and formality, which is now greatly the case; but there is a summer coming, when it will be otherwise; see Luk 21:30.