are] troubled times in our world and even in our own city. We need to bring some calm and some restraint and some wisdom at this time." Fisher was installed as Archbishop of Sydney on 12 November 2014 in a ceremony attended by the Lord Mayor of Sydney (Clover Moore), the Premier of New South Wales (Mike Baird) and John Howard, a former Prime Minister of Australia, as well as other politicians and leaders of Orthodox Christian and other religious communities in Sydney. On 6 May 2015, Pope Francis appointed Fisher a member of the Congregation for the Doctrine of the Faith. On 13 August 2015, Fisher debated moral philosopher Peter Singer at the Sydney Town Hall about the legalisation of euthanasia. The debate was organised by the Sydney University Catholic Society and adjudicated by the ABC's Editor of Religion and Ethics, Scott Stephens. Fisher argued that euthanasia, "creates two classes of people: those whose lives we value and those whose lives we don't" and that while comforting people through their suffering requires more from society, it also places more value on humanity and endorses the intrinsic value of life. In December 2015, Fisher was diagnosed with Guillain–Barré syndrome following a gastrointestinal infection which was complicated by an immune-related pathology. He received intensive care treatment, physiotherapy and rehabilitation at St Vincent's Hospital, Sydney, before moving to Mount Wilga Rehabilitation Centre. The Archdiocese of Sydney announced that Fisher would return to regular, active duties from 5 May 2016 and he celebrated his first public Mass on 29 May 2016. Pope Francis named Fisher as a member of the Congregation for the Oriental Churches on 6 August 2019. The appointment involves specific dialogue with the Eastern churches in Australia and across the world. Response to child sexual abuse cases In July 2008, when asked at a World Youth Day press conference about an alleged case of clerical sexual abuse in Melbourne years earlier, Fisher said: "Happily, I think most of Australia was enjoying delighting in the beauty and goodness of these young people and the hope — the hope for us doing these sorts of things better in the future — as we saw last night [at World Youth Day], rather than, than dwelling crankily, as a few people are doing, on old wounds." The father of the alleged victims and advocates for survivors of abuse reacted angrily and criticised Fisher's language.