Wherefore — And this may be a reason of his desire of liberty of speech, because he could hold his tongue no longer, but must needs tear himself to pieces, if he had not some vent for his grief. The phrase having his life in his hand, denotes a condition extremely dangerous.
Related Commentaries of Job 13:14
Job 13:14
14 Wherefore do I take my flesh in my teeth, and put my life in mine hand?