John Gill Commentary Psalms 74:17

"Thou hast set all the borders of the earth: Thou hast made summer and winter." — Psalms 74:17 (ASV)

You have 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, (Deuteronomy 32:8) , and even has fixed and settled the bounds of every man's habitation, (Acts 17:26) ,

you have made summer and winter ;
see (Genesis 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 (Song of Solomon 2:11Song of Solomon 2:12) , 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 (Luke 21:30Luke 21:31) .