"I still don’t know why my playing is considered so disturbing. I remember in school, as a child, I learned that the flame of a candle is composed of a yellow light, which actually burns, and a blue light within it, which is ice cold. That is true of human beings as well. Perhaps it is the sight of that blue light in me that frightens certain people.”
... Alexis Weissenberg (1929-2012)
French pianist
http://www.youtube.com/watch?v=83Q86WssF38