Job 4:17-18
17. mortal man . . . a man—Two Hebrew words for "man" are used; the first implying his feebleness; the second his strength. Whether feeble or strong, man is not righteous before God.
more just than God . . . more pure than his maker—But this would be self-evident without an oracle.18. folly—Imperfection is to be attributed to the angels, in comparison with Him. The holiness of some of them had given way (2Pe 2:4), and at best is but the holiness of a creature. Folly is the want of moral consideration [UMBREIT].
Job 14:4
4. A plea in mitigation. The doctrine of original sin was held from the first. "Man is unclean from his birth, how then can God expect perfect cleanness from such a one and deal so severely with me?"
Job 15:14
14. Eliphaz repeats the revelation (Job 4:17) in substance, but using Job's own words (see on Job 14:1, on "born of a woman") to strike him with his own weapons.