Mann's sexuality and his attitudes towards it are extremely complex - and the complexities are inherited in the figure of Aschenbach. Mann had lived through a series of (almost certainly unconsummated) relationships with young men.

To my mind, Death in Venice represents an enormous advance in Mann's literary development, not simply for the commonly appreciated reason that he crafted a superbly supple and elegant style, apparently well suited to the kind of prose Aschenbach is supposed to write.

Philosophy by showing - including philosophy in literature - does truly valuable work in leading us to new perspectives from which our arguments can then begin. It does so by introducing new synthetic complexes, which we then reflect on from various points of view. When the complexes survive and grow, that initial showing has been philosophically decisive.

Those citizens are distracted by the toys technology has supplied, and fail to recognize the ways in which what they most deeply want is made vulnerable by the coming disruptions of human relations on an over-heated planet.

Mann was conscious of adopting different perspectives in different parts of the novella, but my guess is that there are plenty of passages in which the resonance of the words he chose struck him as exactly right (even though he didn't probe to discover exactly what tone or narrative device gave them that effect).

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.

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.