There's a great expression in Twelve Step programs: Act as if. Act as if you're a writer. Sit down and begin. Act as if you might just create something beautiful, and by beautiful I mean something authentic and universal. Don't wait for anybody to tell you it's okay. Take that shimmer and show us our humanity. That's your job.
Still Writing: The Perils and Pleasures of a Creative Life (ed. 2013)