There's a very interesting contrast between the attitudes of Job and David concerning the presence of God. As different as their lives were, that is how different their attitudes were.
In Job's case, he prospered most of his life. And we know he feared God, for this is the very reason God boasted of him to Satan, and why Satan began to claim that if God would only stop prospering him, he would curse God to His very face.
Praise be to God, Satan failed. There was nothing he could do to Job that would make him curse God. But Job did start to wonder where God was. He did remain faithful. In fact, throughout his suffering, even when he couldn't find God, still he sought Him. Not once did he allow his doubt to turn into disbelief.
By contrast, there is David. Whereas Job was exalted only to be humbled, David was humble, and yet he was exalted. He started as the youngest, and least respected of many brothers, tending his father's sheep. But he went on to slay a giant, and after a long struggle, he eventually became the most famous king of Israel, and his throne would become the one upon which the Messiah would sit forever.
But David wasn't as upright as Job. Whereas Job seems to have been a man of integrity, David went so far as sleeping with a man's wife, then having that man killed so he could marry her. David's suffering came not because he was so righteous that Satan would beg for the opportunity to sift him like wheat, but because he did evil in the sight of the Lord. And so the Lord punished him, but even in His wrath, the Lord continued to bless David, and to forgive his iniquities. And so David would praise God, seeing Him not only as an avenger of blood, but ultimately as a God who can cover any sin.
For all their differences, David and Job had a lot in common. The key similarity is that no matter what they suffered, they kept their eyes on the God of their salvation. We can learn a lot from their examples. Whether we see God everywhere, as David did, or fail to see Him anywhere, as Job did, we see that it's always best to walk by faith, and not by sight.
Recommended song: Matt Maher - You were on the cross