Albert Barnes' Notes on the Whole Bible - Job 10:21
Before I go - from where “I shall not return.” To the grave, to the land of shades, to“That undiscovered country, from whose bourneNo traveler returns.”To the land of darkness - This passage is important as furnishing an illustration of what was early understood about the regions of the dead. The essential idea here is that it was a land of darkness, of total and absolute night. This idea Job presents in a great variety of forms and phrases. He amplifies it, and uses apparently all the epithets... read more
The Pulpit Commentary - Job 10:22
A land of darkness, as darkness itself ; or, a land of thick darkness (see the Revised Version). And of the shadow of death, without any order . The absence of order is a new and peculiar feature. We do not find it in the other accounts of Hades. But it lends additional horror and weirdness to the scene. And where the light is as darkness. Not, therefore, absolutely without light, but with such a light as Milton calls "darkness visible." read more