Job is no Stoic, striving to be pure mind with no passion. Job's was not the strength of stones or of bronze (6:14). The man is an emotional wreck. The Lord’s testing is not to find out if Job can sit unmoved like a block of wood, but will he continue to hope in God despite his suffering and the emotional turmoil that surrounded it.
The example of Jesus should forever silence those who criticize emotional outbursts and consider them to be sinful or signs of immaturity: ”In the days of his flesh, Jesus offered up prayers and supplications, with loud cries and tears..." (Hebrews 5:7)
Jesus experienced the whole range of human emotions, yet he did not sin. His strongest desire, even in agony, was to surrender himself wholly to his Father.
We are drawn by our suffering to that same point of giving in to our Lord. Going through a wrestling match with God is not an indication of spiritual weakness, but of the intensity of our desire for wholeness. We have a God who lets us be angry at him and accepts our emotional pain as his own. It's okay to fume and fret o'er our troubles; okay to wish they were gone.
What I long for, pray for, therefore, is not bland, vapid, phlegmatic calm, but absolute and undoubting confidence in the love of God in the face of all my troubles—and someday to say with Job, "Though He slay me, yet will I trust him."