Psalms 104:18 - Joseph Benson’s Commentary on the Old and New Testaments

The high hills are a refuge for the wild goats As if he had said, “even those parts of the earth which may seem barren and useless, have yet their uses, and serve to shelter certain animals that are adapted to them.” The psalmist, having alluded to the force of what we call instinct in birds, influencing them to choose secret and secure places in which to fix their habitation, and place their young, proceeds to show the power of the same principle in terrestrial animals, directing them to places of refuge, where they may be safe from their enemies. “Thus the wild goats climb, with ease, to the tops and crags of mountains, where they deposite their young. And thus animals of another kind, which are more defenceless than goats, and not able to climb like them, have yet a way of intrenching themselves in a situation perfectly impregnable among the rocks:” see on Leviticus 11:5.