I think the next [21st] century will be the century of complexity. We have already discovered the basic laws that govern matter and understand all the normal situations. We don't know how the laws fit together, and what happens under extreme conditions. But I expect we will find a complete unified theory sometime this century. The is no limit to the complexity that we can build using those basic laws.
Stephen HawkingWhat was God doing before the divine creation? Was he preparing hell for people who asked such questions?
Stephen HawkingIf the total energy of the universe must always remain zero, and it costs energy to create a body, how can a whole universe be created from nothing?
Stephen HawkingEven if there is only one possible unified theory, it is just a set of rules and equations. What is it that breathes fire into the equations and makes a universe for them to describe?
Stephen Hawking