Quotes from Stephen Hawking

My three children have brought me great joy.

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.

It's time to commit to finding the answer, to search for life beyond Earth. Mankind has a deep need to explore, to learn, to know. We also happen to be sociable creatures. It is important for us to know if we are alone in the dark.

I want my books sold on airport bookstalls.

Obviously, because of my disability, I need assistance. But I have always tried to overcome the limitations of my condition and lead as full a life as possible. I have traveled the world, from the Antarctic to zero gravity.

Before 1915, space and time were thought of as a fixed arena in which events took place, but which was not affected by what happened in it. Space and time are now dynamic quantities... space and time not only affect but are also affected by everything that happens in the universe.

Some scientists think it may be possible to capture a wormhole and enlarge it many trillions of times to make it big enough for a human or even a spaceship to enter.

The missing link in cosmology is the nature of dark matter and dark energy.

As a child, I wanted to know how things worked and to control them. With a friend, I built a number of complicated models that I could control.

Computers double their performance every month.

Some forms of motor neuron disease are genetically linked, but I have no indication that my kind is. No other member of my family has had it. But I would be in favour of abortion if there was a high risk.

The doctor who diagnosed me with ALS, or motor neuron disease, told me that it would kill me in two or three years.

Maybe I don't have the most common kind of motor neuron disease, which usually kills in two or three years.

Life would be tragic if it weren't funny.

The past, like the future, is indefinite and exists only as a spectrum of possibilities.

Every man should marry. After all, happiness is not the only thing in life.

I hope I have helped to raise the profile of science and to show that physics is not a mystery but can be understood by ordinary people.

As scientists, we step on the shoulders of science, building on the work that has come before us - aiming to inspire a new generation of young scientists to continue once we are gone.

M-theory is the unified theory Einstein was hoping to find.

There is no unique picture of reality.

I believe in universal health care. And I am not afraid to say so.

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

If you understand the universe, you control it, in a way.

The universe is not indifferent to our existence - it depends on it.