"The very success of the scientific method depends upon the fact that the physical world operates according to rational principles which can therefore be discerned through rational inquiry. Logically, the universe does not have to be in this way. We could conceive of a cosmos where chaos reigns. In place of the orderly and regimented behavior of matter and energy one would have arbitrary and haphazard activity. Stable structures like atoms or people or stars could not exist. The real world is not this way. It is ordered and complex. Is that not itself an astonishing fact at which to marvel"—*P. Davies, Superforce: The Search for a Grand Unified Theory of Nature (1984), p. 223.