Was Mann himself fully aware of all the facets of his irony? Probably not - any more than Shakespeare was fully aware of all the riches subsequent critics have found in his plays.

One of the things I want to do in the book is to explore how philosophy can be done in literature. I start doing that in the first chapter, by introducing the idea of "philosophy by showing". What literature/philosophy shows is how to look at some important facets of life in a new way, thus changing the frame in which subsequent philosophical argument proceeds.

A different vision of ethics is that of a collection of resources people can use to act better. The resources might be firm rules that could always be relied on. Or they might be ideals that could often be followed without thinking but that sometimes conflicted with one another.

I read Aschenbach's constant desire to go beyond the works he has already produced to be the counterpart of Mann's deep wish to surpass his previous fiction; sometimes the diaries express this in terms of a dejected judgment that the summit has already been reached.

Mann was less interested, I think, in constructing any kind of "portrait of an age" than he was in delineating an individual consciousness in which profound struggles about identity and direction arise - struggles that Mann himself had not only reflected on but felt keenly. Visconti takes up this central focus of the novella, but he couples it with a more social perspective.

Schopenhauer's thought that Will is insatiable, that once satisfied in one form it must be expressed in new desires, is inherited both by Mann and by Aschenbach (it's in Mahler, as well). So life is inevitably incomplete.

I'm very suspicious of the idea of a "final theory" in natural science, and the thought of a complete system of ethical rules seems even more dubious.