4:7 righteous cut off. Many people have believed that the book of Job was written to answer the question as to why the righteous suffer. Eliphaz here proposes his solution: the righteous don’t suffer. Therefore, Job must have committed some grievous sin, and is being punished for it. He and the other two friends keep repeating this simplistic solution throughout the entire dialogue. God eventually pronounced it to be all wrong (Job 42:7).
4:15 a spirit. This was an evil spirit—perhaps Satan himself—diabolically implanting an accusation against Job in the mind of Eliphaz, which would be used later with telling effect to try to undermine Job’s faith. The spirit stressed God’s wrathful righteousness and man’s sinful worthlessness, with no hint at all of God’s love and saving grace. This would be translated by Eliphaz into the conviction that Job must be, despite outward appearances, a sinner suffering God’s judgment.
4:18 his angels. The Satanic spirit here expresses his bitterness over the fate of those fallen angels who invaded the bodies of human women in the antediluvian world (Genesis 6:1-4), and were banished to the lowest hell (Greek tartarus) to await final judgment (II Peter 2:4; Jude 6).
4:19 in the dust. The resentment of Satan and his angels against those created in God’s image is evident here in the spirit’s scornful reference to the formation of man’s body out of the dust of the earth and his soon return thereto (Genesis 2:7; 3:19).