Art is a high calling - fears are coincidental. Coincidental, sneaky and disruptive, we might add, disguising themselves variously as laziness, resistance to deadlines, irritation with materials or surroundings, distraction over the achievements of others - indeed as anything that keeps you from giving your work your best shot. What separates artists from ex-artists is that those who challenge their fears, continue; those who don't, quit.
Art & Fear: Observations on the Perils (and Rewards) of Artmaking (ed. Image Continuum Press, 2001) - ISBN: 9780961454722