Statement from Robert Anton Wilson's Prometheus Rising, colorfully expressing the notion of an observer-created reality. Wilson mentions the more fanciful history of this notion, such as Berkeley's Esse Est Percipi, but there are more rigorous schools of thought that espouse similiar notions, such as the Everett-Wheeler-Graham model of quantum reality. For an interesting examination of observer-created realities (as well as a lot of interesting quantum theory), check out John Gribbin's In Search of Schrodinger's Cat.