Charles Ellicott Commentary Job 7:9

"As the cloud is consumed and vanisheth away, So he that goeth down to Sheol shall come up no more." — Job 7:9 (ASV)

As the cloud is consumed. —It is a fine simile that man is as evanescent as a cloud; and very apt is the figure, because, whether it vanishes on the surface of the sky or is distributed in rain, nothing more completely passes away than the summer cloud. It is an appearance only, which comes to nothing.