Job's friends had to repent. They were guilty of theological malfeasance. In their haste to explain away Job's suffering, they had presented a damning vision of God. So then they had to bring costly sacrifices and ask Job to preside over the ritual... Job, who like his friends, had many ignorant words about God, now knew God, now had seen the mystery of God that is too deep for words. He offered the sacrifice for his friends. He prayed for their forgiveness. It is at this point that his life was restored. (p. 77)
We are quick to jump to Job's restoration of material prosperity and new family, etc. Job's soul-- his community with both friends and the Holy One- was restored first, through repentance and forgiveness. The work of restoration is, in large part, rethinking what kind of God, God is. It's understandable that words spoken by unthinking Christians are not erased easily- especially because they are spoken in the name of Jesus.
For me, repentance and restoration is choosing to begin and end each day with the One who created me and everyone out- of love- not out of need, with no hidden agendas. This One gives all living things breath and creates humankind in God's own image and likeness.