“What’s your favorite flavor of shit sandwich?” What Manson means is that every single pursuit—no matter how wonderful and exciting and glamorous it may initially seem—comes with its own brand of shit sandwich, its own lousy side effects. As Manson writes with profound wisdom: “Everything sucks, some of the time.” You just have to decide what sort of suckage you’re willing to deal with. So the question is not so much “What are you passionate about?” The question is “What are you passionate enough about that you can endure the most disagreeable aspects of the work?” Manson explains it this way: “If you want to be a professional artist, but you aren’t willing to see your work rejected hundreds, if not thousands, of times, then you’re done before you start. If you want to be a hotshot court lawyer, but can’t stand the eighty-hour workweeks, then I’ve got bad news for you.” Because if you love and want something enough—whatever it is—then you don’t really mind eating the shit sandwich that comes with it.”
― Elizabeth Gilbert
From the wonderful book Big Magic. It’s like rocket fuel for any creatively minded human.