We live in a bewildering world.
I think we have a good chance of surviving long enough to colonize the solar system.
I think the human race doesn't have a future if it doesn't go into space.
Even 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?
Theology is unnecessary.
Does general relativity predict that our universe should have had a big bang, a beginning of time?
I first had the idea of writing a popular book about the universe in 1982. My intention was partly to earn money to pay my daughter's school fees.
Einstein never accepted that the universe was governed by chance; his feelings were summed up in his famous statement God does not play dice.
The thing about smart people is that they seem like crazy people to dumb people.
What did God do before he created the universe?
There is nothing bigger or older than the universe.
My goal is simple. It is complete understanding of the universe, why it as it is and why it exists as all.
If we do discover a complete theory, it should be in time understandable in broad principle by everyone. Then we shall all, philosophers, scientists, and just ordinary people be able to take part in the discussion of why we and the universe exist.
But in 1929, Edwin Hubble made the landmark observation that wherever you look, distant galaxies are moving rapidly away from us. In other words, the universe is expanding.
If the government is covering up knowledge of aliens, they are doing a better job of it than they do at anything else.
Feynman once wrote, I think I can safely say that nobody understands quantum mechanics.
It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss and black holes, it was 29 years.
My work and my family are very important to me.
Humanity's deepest desire for knowledge is justification enough for our continuing quest. And our goal is nothing less than a complete description of the universe we live in.
There is no picture- or theory-independent concept of reality.
Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor.