From a personal perspective, for the average person, the world at large, the world “out there”, seems to be a very stable place. We wake up each morning to familiar surroundings: the walls of our homes, the streets we walk, the faces we know. The world appears solid, unwavering, and reliable. Indeed, for most of us, the “out there” is so concrete that it feels as though it is filled with hard, unchanging objects: tables, chairs, buildings, trees, and even the sky abov...