“Has it been noticed that music makes the spirit free? That it gives wings to thought? That one becomes so much more a philosopher, the more one becomes a musician? The grey heaven of abstraction thrilled, as it were, by lightings; the light strong enough for all the filigree of things; the great problems ready to be grasped; the universe surveyed as from a mountain summit... All that is good makes me productive. I have no other gratitude, nor have I any other proof of what is good.” [The Case of Wagner, 7]