Tangental to Ray's drawing his fears, I too had/have a manifestation of my doubts that comes through in doodling. Though mine is a character, Lil' Mikey, a rough representation of myself at six or seven... slender, doe-eyed, with a He-Man bowlhaircut, a Spidey shirt and sweat#####.
Generally, his purpose is to berate me for not living up to his potential, not accomplishing the goals he set out to accomplish and generally for not being the World-Beater Genius he believed himself/me/us to be. Also, because I grew up to be fat.
Do most peoples' inner-children do this to them? Tell them that 26 is too old to break in as a writer... to put the MacDonalds down, fatty... etc etc? I always assumed that most peoples' inner children just pop up to remind them how fun it is to play on swings or to suggest that maybe they should look on myspace for that girl they had a crush on in the third grade.
Not at the margins of notebooks, proclaiming you a failure.
Anyway, I just assumed Ray's fear of violins was that he'd never be really really good on them.
I view Ray's life as so confused by prilivedge that the only two things he has to be afraid of are... not being automatically awesome at things and death. If you've got enough money to choke Warren Buffet, what else is there to be afraid of?