That he (i.e. God) may withdraw man from his purpose; literally, from his work, assumed to be a wrongful work. Elihu regards the Divine teaching through visions as intended to elevate and purify men.
Sometimes God so works upon them as to make them abandon an evil course on which they had entered. Sometimes his object is to save them from indulgence in an evil temper into which, without his help, they might have fallen.
In this latter case he may occasionally hide pride from man. Elihu, perhaps, thinks that Job is unduly proud of his integrity.