Chuck Wendig wrote this post for writers, but I think it’s relevant to any kind of creative activity:
Suddenly Old Mister Doubt is jabbering in your ear.
You’re not good enough.
You’ll never make it, you know.
Everyone’s disappointed in you.
Where are your pants? Normal people wear pants.
…self-doubt is the enemy of the writer. It is one of many: laziness, fear, ego, porn, Doritos. But it is most certainly one of the worst, if not the worst, in the writer’s rogue gallery of nemeses.