Using the Adagietto of Mahler's Fifth is one of the touches of pure genius in Visconti's film (even though Mahlerians complain very loudly that the piece has been ruined), since it corresponds perfectly to Aschenbach's yearnings and to his circling walks around Venice.

Klaus Mann saw very clearly how different was his own (more liberated) form of homosexuality from the same-sex attractions of his father - and that is reiterated in TM's diary queries about "how two men can sleep together".

In ethics, we don't make progress by discovering pre-existent truths; we do so by solving problems.

After two years of undergraduate study, it was clear that I was bored by the regime of problem-solving required by the Cambridge mathematical tripos. A very sensitive mathematics don recommended that I talk to the historian of astronomy, Michael Hoskin, and the conversation led me to enroll in the History and Philosophy of Science for my final undergraduate year.

The expert is a midwife. The expert is not someone who has the authority to pronounce the last word on the subject.

In the end, we learn about the most basic philosophical questions - like "How to live?" - from a broad mixture of sources, including literature and philosophy, history and anthropology. These sources can guide our reflections on our own experiences, as we explore and reconsider. Mann contributed to such explorations in a distinctive way, and I hope my book brings that out.

Many of the greatest works of philosophy seem to me to be valuable not because of their arguments, but because they offer us perspectives that open up new possibilities. They show us how we might start in different places, and not buy into the assumptions tacitly made on the first pages of the philosophical works that have influenced us.