Hans Kung is undoubtedly one of the most important theologians of our time, but he has always been a controversial figure, and as the result of a much-publicized clash over papal infallibility had his permission to teach revoked by the Vatican. Yet he is also something like a senior statesman, one of the "Group of Eminent Persons" convened by the UN Secretary-General Kofi Annan, and a friend of heads of government like Tony Blair and President Mubarak of Egypt. In this autobiography he gives a frank and outspoken account of the first four decades of his life. He tells of his youth in Switzerland and his decision to become a priest; his doubts and struggles as he studied in Rome and Paris, and his experiences as a professor in Tubingen, where he received a chair at the amazingly early age of 31. Most importantly, as one of the last surviving eye-witnesses he gives an authentic account of the struggles behind the scenes at the Second Vatican Council, in which he took part as a theological expert.