Adam Clarke on Job 38:20

Shouldest take it to the bound thereof? - Or, as Mr. Good, translates, "That thou shouldest lay hold of it in its boundary." That thou shouldest go to the very spot where light commences, and where darkness ends; and see the house where each dwells. Here darkness and light are personified, each as a real intelligent being, having a separate existence and local dwelling. But poetry animates everything. It is the region of fictitious existence. I believe this verse should be translated thus: - "For thou canst take Us to its boundary; for thou knowest the paths to its house." This is a strong irony, and there are several others in this Divine speech. Job had valued himself too much on his knowledge; and a chief object of this august speech is to humble his "knowing pride," and to cause him to seek true wisdom and humility where they are to be found.