Knowest thou [it], because thou wast then born?.... When light and darkness were first separated, and had their several apartments assigned them; their laws and rules given them, and their bounds and limits set them?
No; he was not: and, had he been the first man, could not have been early enough to have been present at the doing of this, and so come at the knowledge thereof; since man was not made until the sixth day of the creation;or [because] the number of thy days [is] great; reach to the beginning of time, and so as old as the creation.
This was not the case. Some understand these words ironically; "thou knowest" the places and bounds of light and darkness, since thou art a very old man, born as soon as the world was. Whereas he was of yesterday, and knew nothing; which to convince him of is the design of this biting, cutting, expression.
The Targum is,"didst thou know then that thou shouldest be born, and the number of thy days many?'