Commentaries:
Jamieson, Fausset, and Brown
one—rather, "He" (God). "Oh, that He would plead for a man (namely, me) against God." Job quaintly says, "God must support me against God; for He makes me to suffer, and He alone knows me to be innocent" [UMBREIT]. So God helped Jacob in wrestling against Himself (compare Job 23:6; Genesis 32:25). God in Jesus Christ does plead with God for man (Romans 8:26-27).
as a man—literally, "the Son of man." A prefiguring of the advocacy of Jesus Christ—a boon longed for by Job (Job 9:33), though the spiritual pregnancy of his own words, designed for all ages, was but little understood by him (Psalms 80:17).
for his neighbour—Hebrew, "friend." Job himself (Job 42:8) pleaded as intercessor for his "friends," though "his scorners" (Job 16:20); so Jesus Christ the Son of man (Luke 23:34); "for friends" (John 15:13-15).
Other Jamieson, Fausset, and Brown entries containing Job 16:21:
Job 17:3
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