Susan Reynolds said this quote

Mostly writing requires massive dedication, a whole lot of time spent alone, way too much sitting, countless hours spent thinking hard, and unending and occasionally painful dedication to forming ideas and laboring over the production of sentences, paragraphs, scenes, dialogue, punctuation, and all the elements that go into writing a novel, a play, a screenplay, or a poem. When we're not writing, we're thinking, plotting, imagining, or editing, which can be far more tedious than cranking out first drafts.--Fire Up Your Writing Brain