Found via Abnormal Returns. The Warren Buffett quote that comes to mind: "We don't have to be smarter than the rest. We have to be more disciplined than the rest."
I know a girl who, despite a flimsy record of personal achievement, has made a living out of being optimistic. People are so desperate to hear feel-good messages they pay her money to be told, “You’re special and you can do it!” Of course, this girl isn’t alone. The entire self improvement industry and what appears to be half of my Facebook newsfeed consist of similar proclamations of “follow your dreams!”