Albert Barnes Commentary Job 19:4

"And be it indeed that I have erred, Mine error remaineth with myself." — Job 19:4 (ASV)

And be it indeed that I have erred - Admitting that I have erred, it is my own concern. You have a right to reproach and revile me in this manner.

Mine error abideth with myself - I must abide the consequences of the error. The design of this seems to be to reprove what he regarded as an improper and meddlesome interference with his concerns. Or it may be an expression of a willingness to bear all the consequences himself. He was willing to meet all the fair results of his own conduct.