These two verses are almost identical to 38.1-3. See there for comments. These verses introduce the second divine speech, which continues without interruption to 41.34, to which Job makes a final response (42.1-6).
Quoted with permission from Reyburn, Wiliam. A Handbook on Job. (UBS Helps for Translators). New York: UBS, 1992. For this and other handbooks for translators see here .