This is an extreme example, but still...
In smaller ways, fear freezes us in place, unable to take risks, feel feelings, try new things, set boundaries, change things that so need changing. It is no different in art, where the fear of taking creative risks keeps us stuck in a rut and reformulating the thing we already can do. Fear is the mind killer.
But a little progress, like taking one step when the feet really don't want to move, is freedom from fear. That first step is everything you need to take the next one. Ready? Set? GO!