In Job 15 Eliphaz speaks words of condemnation against Job.  He seems to be saying that Job should be listed among the wicked because of all the things that were taken away; his children, his wealth, his friends, his respect.  Eliphaz falsely accuses Job because he's using the wrong scales with which to measure. 

Job admonishes his “friends” by saying that he has heard all their speeches and he himself would maybe do the same to them and point out their failures as well. But Job adds one more thing to the mix. He tells them that he would also encourage them. 

Part of Job 16 is filled with specific details about Job’s afflictions. "...my gauntness rises up and testifies against me." He is as a skeleton because of lack of nourishment.

"Men open their mouths to jeer at me; they strike my cheek in scorn."
Men taunting Job with their words is disrespect enough but striking his cheek was a major insult. They have also spit in his face. 

"Without pity, he pierces my kidneys and spills my gall on the ground."
Organs are failing, possible kidney stones, vomiting up gall.

Job thinks that God is responsible for all the ailments that are afflicting him.  What Job doesn't understand is that God is allowing it.

"I have sewed sackcloth over my skin and buried my brow in the dust."
Job has gone beyond merely wearing sackcloth and sprinkling himself with ashes as a sign of mourning and weeping.  He has buried his brow in the dust. 

"My eyes have grown dim with grief; my whole frame is but a shadow."
Is Job's eyesight failing?  Cataracts, perhaps?

But Job begins to “see the light” and verbalizes what he already knows, that  he does have that advocate he was wishing for earlier. (Job 9:32-34) He talks about his advocate and intercessor. Sounds as if he also has an understanding of the role of the Holy Spirit as the guarantor of salvation, the one who puts up security for him.

Job 17:3
"Give me, O God, the pledge you demand. Who else will put up security for me?

2 Corinthians 1:21-22
Now it is God who makes both us and you stand firm in Christ. He anointed us, set his seal of ownership on us, and put his Spirit in our hearts as a deposit, guaranteeing what is to come. 

Imagine this...HIS hands were on us as HE anointed us with the oil of the Holy Spirit. HE has put up security for us. HE guarantees us what is to come.

Praise God, we "stand firm in Christ"!