Job now goes ahead and rebukes his friends and tells them that they as worthless to him. He says, ‘what advice you have offered to one without wisdom!’ which is his way of mocking them. He even asks Bildad if he was inspired by his words as Eliphaz claimed.
He argues that God’s power is undeniable and man can’t hide from Him, Psalm 139. He knew the majesty and power of God and so, what Job wanted to know was how God used His power in reference to His people.
Some believed that Sheol, that is, the realm of the dead, was in the depths of the sea, Isaiah 14:9. Job’s point is simply this, the dead aren’t beyond the power of God, that is, no one can escape God, even in death.
As far as the naked human eye can see in the northern night, all we see is an empty space. The earth isn’t held in place by another material object. What Job is describing is the cosmology of his day. His description of the world and universe far exceeded that which had previously been given by any of his friends.
He’s saying that God is in control of all things, though at this time in his sufferings he was still wondering why God didn’t intervene in order to bring him relief.
Job now makes the point that God does many things beyond the understanding of man and therefore, could be doing something to Job that is beyond man’s understanding. Remember Job has no idea that Satan is behind his suffering, he has no idea that God is allowing it to happen, Job 1:6-12 / Job 2:1-6.
With His power, God is able to subdue the sea though it may rage and He can clear away storm clouds and dismiss any supposed monsters of the sea. God is incomprehensible and man can hear only a whisper from Him.