I shut out the voices by reminding myself that I write because it changes me. I don’t write as a mission to the world or a gift to humanity or a calling card for business or to impress my wife (lord knows that doesn’t work) or to prove my point to anyone. I write for me. I write because doing so every day makes me more of the person I want to be.
Believe that confidence is something that can be acquired. Tom Stocky’s article, one of my favorites says it better than I ever could: growing in self-confidence is really about growing in two skills: self-awareness and growth mindset. The first is understanding yourself as objectively as you can — what are you good at, and what do you suck at? The second is being okay with that and realizing that where you are now is just a starting point for where you can get to, with time and sustained effort.