Look up at the stars and not down at your feet. Try to make sense of what you see, and wonder about what makes the universe exist. Be curious.
Stephen Hawking

However difficult life may seem, there is always something you can do and succeed at.
Stephen Hawking

I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.
Stephen Hawking

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill.
Stephen Hawking

My advice to other disabled people would be, concentrate on things your disability doesn't prevent you doing well, and don't regret the things it interferes with. Don't be disabled in spirit as well as physically.
Stephen Hawking

Life would be tragic if it weren't funny.
Stephen Hawking

I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth.
Stephen Hawking

We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet.
Stephen Hawking

Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.
Stephen Hawking

Imaginary time is a new dimension, at right angles to ordinary, real time.
Stephen Hawking

According to 'M' theory, ours is not the only universe. Instead, 'M' theory predicts that a great many universes were created out of nothing.
Stephen Hawking

A few years ago, the city council of Monza, Italy, barred pet owners from keeping goldfish in curved bowls... saying that it is cruel to keep a fish in a bowl with curved sides because, gazing out, the fish would have a distorted view of reality. But how do we know we have the true, undistorted picture of reality?
Stephen Hawking

Evolution has ensured that our brains just aren't equipped to visualise 11 dimensions directly. However, from a purely mathematical point of view it's just as easy to think in 11 dimensions, as it is to think in three or four.
Stephen Hawking

Because there is a law such as gravity, the universe can and will create itself from nothing.
Stephen Hawking