Should philosophers be expected to change the world? Such an expectation seems to me extravagant. Marx himself didn't change the world: he reinterpreted it, then other people changed it.
Temperament is fixed, set. The skull, followed by the temperament: the two hardest parts of the body. Follow your temperament. It is not a philosophy, It is a rule, like the Rule of St Benedict.
Music expresses feeling, that is to say, gives shape and habitation to feeling, not in space but in time. To the extent that music has a history that is more than a history of its formal evolution, our feelings must have a history too. Perhaps certain qualities of feeling that found expression in music can be recorded by being notated on paper, have become so remote that we can no longer inhabit them as feelings, can get a grasp of them only after long training in the history and philosophy of music, the philosophical history of music, the history of music as a history of the feeling soul.
