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).