The light is dark in his tent, and his lamp above him is put out.
The rest of Bildad's discourse is entirely taken up in an elegant description of the miserable condition of a wicked man, in which there is a great deal of certain truth, and which will be of excellent use if duly considered - that a sinful condition is a sad condition, and that iniquity will be men's ruin if they do not repent of it.
Commenting on Job 18:5-10
The steps of his strength shall be straitened,.... As a man in health can take large and strong steps, and travel in the greatness of his strength; so in prosperity he can and does take large steps in obtaining fame and reputation among men, in amassing substance to himself, and towards settling his family in the world; he is like one in a large place...
candle--the lamp which in the East is usually fastened to the ceiling. Oil abounds in those regions, and the lamp was kept burning all night, as now in Egypt, where the poorest would rather dispense with food than the night lamp (Psa 18:28). To put out the lamp was an image of utter desolation.