For His eyes are on the ways of a man, and He sees his every step.
Elihu here addresses himself more directly to Job. He had spoken to the rest (Job 34:10) as men of understanding; now, speaking to Job; he puts an if upon his understanding: If thou hast understanding, hear this and observe it, Job 34:16. I. Hear this, That God is not to be quarrelled with for any thing that he does.
Commenting on Job 34:16-30
There is no darkness, nor shadow of death, where the workers of iniquity may hide themselves. By whom may be meant chiefly profane sinners that are abandoned to a vicious course of life, and make a trade of sin, or that the common course of their lives; though secret sinners, and even professors of religion, hypocrites, who in a more private manner live in sin...
God's omniscience and omnipotence enable Him to execute immediate justice. He needs not to be long on the "watch," as Job thought (Job 7:12; Ch2 16:9; Jer 32:19).