All darkness shall be hid in his secret places: a fire not blown shall consume him; it shall go ill with him that is left in his tabernacle.
All darkness - i:e., every calamity that befalls the wicked shall be hid (in store for him) in His (God's secret places or treasures, Jude 1:13; Deut. 33:34). Maurer, not so well, takes it, 'in the sinner's secret treasures.'
Not blown - not kindled by man's hands, but by God's (Isaiah 30:33; Isaiah 33:11-14; the Septuagint, in Alexandrian manuscript, read 'unquenchable fire;' Matthew 3:12). Tact is shown by the friends in not expressly mentioning, but alluding, under colour of general cases, to Job's calamities here (Job 1:16).
Umbreit explains it, wickedness is a 'self-igniting-fire;' in it lie the principles of destruction.
Ill ... tabernacle - every trace of the sinner must be obliterated (Job 18:15).