I will plead with thee in God's name and stead, and on his behalf, which thou hast oft wished that God would do upon equal terms, and laying aside his terrible majesty, &c. Or, I am as thou art with or towards God, i.e. God's creature like thyself, as the next words explain it.
Related Commentaries of Job 33:6
Job 33:6
6 Behold, I am according to thy wishb in God's stead: I also am formed out of the clay.