While his lawyers' rebuttal was sharp, detailed and contentious, Benedict's page-and-a-half page German letter was deeply personal and couched in religious terms as he reflected on a long life approaching its end.In one section he openly wondered if he, as all Catholic do in a prayer known as the Confiteor at Mass, should ask for forgiveness for what they have done and what they have failed to do" by my fault, by my most grievous fault".He wrote:" It is clear to me that the words' most grievous'