Lamentations 5:17,18 - Joseph Benson’s Commentary on the Old and New Testaments

For this our heart is faint And sinks under the load of its own heaviness. Our eyes are dim See on Lamentations 2:11. Our spirits fail us, and we are almost blind with weeping. Because of the mountain of Zion The holy mountain, and the temple built upon it. Nothing lies with so heavy a load upon the spirits of good people, as that which threatens the ruin of religion, or weakens the interest thereof: and it is a mark of our possessing saving grace, if we can appeal to God that we are more concerned for his cause than for any temporal interests of our own. The Jews had polluted the mountain of Zion with their sins, and therefore God justly made it desolate; which he did to such a degree that the foxes walked upon it, as freely and commonly as they did in the woods. It is lamentable indeed when the mountain of Zion is made a portion for foxes, Psalms 63:10.