By now, we're all aware of the fact that we're supposed to "think positively" all the time, that "our inner worlds create our outer worlds," and that we'll be happier if we just think happy thoughts all the time. That's super great if you're a naturally happy person or if your life is perfect, but it doesn't leave a heck of a lot of space for you to actually feel some negative feelings.Negative feelings, remember those? The ones that are supposed...