and I quote...

"He knew that even the memory of the piano falsified still further the perspective in which he saw the elements of the music, that the field open to the musician is not a miserable scale of seven notes, but an immeasurable keyboard still almost entirely unknown on which, here and there only, separated by shadows thick and unexplored, a few of the millions of keys of tenderness, of passion, of courage, of serenity which compose it, each as different from the others as one universe from another universe, have been found by a few great artists who do us the service, by awakening is us something corresponding to the theme they have discovered, of showing us what richness, what variety, is hidden unbeknownst to us within that great unpenetrated and disheartening darkness of our soul which we take for emptiness and nothingness."
-from "Swann's Way" by Marcel Proust.