And so, while we know many things about ourselves in anatomical, physiological, and evolutionary terms, we currently have no idea why it is "like something" to be what we are. The fact that the universe is illuminated where you stand, the fact that your thoughts and moods and sensations have a qualitative character, is an absolute mystery-rivaled only by the mystery, famously articulated by the philosopher Schelling, that there should be anything at all in this universe rather than nothing. The problem is that our experience of brains, as objects in the world, leaves us perfectly insensible to the reality of consciousness, while our experience as brains grants us knowledge of nothing else. Given this situation, it is reasonable to conclude that the domain of our subjectivity constitutes a proper (and essential) sphere of investigation into the nature of the universe: as some facts will be discovered only in consciousness, in first-person terms, or not discovered at all.