The Pulpit Commentary - Job 38:21
Knowest thou it, because thou wast then born? The irony that has underlain the whole address comes here to the surface, and shows itself palpably. Job, of course, is as old as the Almighty, or, at any rate, coeval with creation; otherwise he could not presume to take the tone which he has taken, and arraign the moral government of the Creator. Or because the number of thy days is great? Compare the sarcasm of Eliphaz ( Job 15:7 ). read more
The Pulpit Commentary - Job 38:20
That thou shouldest take it to the bound thereof . Can Job "take" light and darkness, and lead them to their proper places, and make them observe their proper "bounds," as God can ( Genesis 1:4 )? And that thou shouldest know the paths to the house thereof (comp. verse 19). read more