Being unabashedly yourself is no easy task, but to screenwriter, director, and novelist Charlie Kaufman, it also yields your best creative work. Here, the mind behind such films as “Being John Malkovich,” and “Eternal Sunshine of the Spotless Mind” acknowledges his self-doubt, but pushes for authenticity nonetheless. It’s easy to let our insecurity stop us from accomplishing what we want to do and becoming who we want to be. But art requires bravery, starting with letting go of the fear of not being enough.