When you act out of fear, your fears come true.
Fears about artmaking fall into two families: fears about yourself, and fears about your reception by others. In a general way, fears about yourself prevent you from doing your best work, while fears about your reception by others prevent you from doing your own work. p. 23
The fear that you’re only pretending to do art is the (really predictable) consequence of doubting your own artistic credentials… Fear that you are not a real artist causes you to undervalue your work. p. 24