I appreciated your linking of fear with 'not good enough' because it points to the webs of perception we develop as hard wiring meets social conditioning over the year.

My favourite 'fear' story is about Ajahn Chah, one of the pioneers of meditative Thai Buddhism, who as a young man was terrified of ghosts (a big and real part of Thai culture). He took up a practice as a monk of spending the night in grave yards, which in Thailand also means snakes as well as potential spirits and ghosts. He learned to 'patiently endure', ie abide with fear without being overwhelmed.