Why would the Upper Being do so?

But if the same Upper Being stirred the Element of the Wind in a manner contrary to its nature, then that Upper Being must have crept and come down from his natural height; and what Cause, then, stirred him up, too, that he should hurl Contention [Cf. p. lxxiii. l. 15.] and Strife among the Entities and Natures which were in a peaceful state, and, if they know not, whence did this cause spring?

For as regards these other things which they say concerning the Entities, whence did they learn that they are as they say? If the spirit of revelation made (it) known to them, it ought to [P. 57.] have revealed to them (something) concerning the Cause on which all the causes depended.