"But Elihu son of Barakel the Buzite, of the family of Ram, became very angry with Job for justifying himself rather than God. He was also angry with the three friends, because they had found no way to refute Job, and yet had condemned him."
As guilty as a person may be, if there is insufficient evidence to convict of sin, there can be no condemnation. A person is "innocent" until proven "guilty" and because Job had not yet been refuted by his friends, he started to actually believe himself to be innocent. He justified himself rather than God whom he accused of wronging him, something Elihu recognized rightly to be utter nonsense.
Elihu became God's defense attorney and also Job's prosecutor, showing him his fault and defending God's name. But it wasn't enough. God himself stepped out of Heaven to Job's front door and began his cross examination of Job, once and for all convicting him of sin. But Job was not sentenced. He was not punished. Rather he humbled himself and all things were restored to him and more!
So how much more, then, has a God who has proven the world's sin and guilt, exonerate those who humble themselves and repent? How much more will he restore to them not only their lives, but eternal life? Through the Law our transgressions multiplied so that we should be proven utterly sinful, but through our Judge Jesus Christ we bear no burden if we humble ourselves and obey.