Charles Bukowski said this quote
“ Writing is something that you don't know how to do. You sit down and it's something that happens, or it may not happen. So, how can you teach anybody how to write? It's beyond me, because you yourself don't even know if you're going to be able to. I'm always worried, well, you know, every time I go upstairs with my wine bottle. Sometimes I'll sit at that typewriter for fifteen minutes, you know. I don't go up there to write. The typewriter's up there. If it doesn't start moving, I say, well this could be the night that I hit the dust. ”