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Danh ngôn của Stephen Hawking (Sứ mệnh: 7)

I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image.
We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.
Not only does God play dice, but... he sometimes throws them where they cannot be seen.
The usual approach of science of constructing a mathematical model cannot answer the questions of why there should be a universe for the model to describe. Why does the universe go to all the bother of existing?
The whole history of science has been the gradual realization that events do not happen in an arbitrary manner, but that they reflect a certain underlying order, which may or may not be divinely inspired.
It is not clear that intelligence has any long-term survival value.
Intelligence is the ability to adapt to change.
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.
Most sets of values would give rise to universes that, although they might be very beautiful, would contain no one able to wonder at that beauty.
I don't think the human race will survive the next thousand years, unless we spread into space.
I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first.
Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in.
There is no heaven or afterlife for broken-down computers; that is a fairy story for people afraid of the dark.
Philosophers have not kept up with modern developments in science. Particularly physics.
Scientists have become the bearers of the torch of discovery in our quest for knowledge.
I believe in universal health care. And I am not afraid to say so.
The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to minus 271.3*C - not much good for defrosting the pizza, let alone cooking it.
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.
Science is not only a disciple of reason but, also, one of romance and passion.
There is a real danger that computers will develop intelligence and take over. We urgently need to develop direct connections to the brain so that computers can add to human intelligence rather than be in opposition.
I would like nuclear fusion to become a practical power source. It would provide an inexhaustible supply of energy, without pollution or global warming.
I enjoy all forms of music - pop, classical and opera.
The media need superheroes in science just as in every sphere of life, but there is really a continuous range of abilities with no clear dividing line.
Life would be tragic if it weren't funny.
Work gives you meaning and purpose and life is empty without it.
Women. They are a complete mystery.
I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science.
It is generally recognised that women are better than men at languages, personal relations and multi-tasking, but less good at map-reading and spatial awareness. It is therefore not unreasonable to suppose that women might be less good at mathematics and physics.
People won't have time for you if you are always angry or complaining.
My first popular book, 'A Brief History of Time,' aroused a great deal of interest, but many found it difficult to understand.
Science is beautiful when it makes simple explanations of phenomena or connections between different observations. Examples include the double helix in biology and the fundamental equations of physics.
Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global nuclear war, a genetically engineered virus or other dangers we have not yet thought of.
I believe the universe is governed by the laws of science. The laws may have been decreed by God, but God does not intervene to break the laws.
Imaginary time is a new dimension, at right angles to ordinary, real time.
However difficult life may seem, there is always something you can do and succeed at.
The past, like the future, is indefinite and exists only as a spectrum of possibilities.
Success in creating AI would be the biggest event in human history. Unfortunately, it might also be the last, unless we learn how to avoid the risks.
As Irving Good realised in 1965, machines with superhuman intelligence could repeatedly improve their design even further, triggering what Vernor Vinge called a 'singularity.'
I believe things cannot make themselves impossible.
Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.'
The missing link in cosmology is the nature of dark matter and dark energy.
Science is increasingly answering questions that used to be the province of religion.
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.
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.
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.
Even if it turns out that time travel is impossible, it is important that we understand why it is impossible.
I was born on January 8, 1942, exactly three hundred years after the death of Galileo. I estimate, however, that about two hundred thousand other babies were also born that day. I don't know whether any of them was later interested in astronomy.
Time can behave like another direction in space under extreme conditions.
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?
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.
Computers double their performance every month.
Sometimes I wonder if I'm as famous for my wheelchair and disabilities as I am for my discoveries.
God is the name people give to the reason we are here. But I think that reason is the laws of physics rather than someone with whom one can have a personal relationship. An impersonal God.
Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor.
It was Einstein's dream to discover the grand design of the universe, a single theory that explains everything. However, physicists in Einstein's day hadn't made enough progress in understanding the forces of nature for that to be a realistic goal.
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.
Science can lift people out of poverty and cure disease. That, in turn, will reduce civil unrest.
If you believe in science, like I do, you believe that there are certain laws that are always obeyed.
I think we have a good chance of surviving long enough to colonize the solar system.
While physics and mathematics may tell us how the universe began, they are not much use in predicting human behavior because there are far too many equations to solve. I'm no better than anyone else at understanding what makes people tick, particularly women.
A zero-gravity flight is a first step toward space travel.
I have found far greater enthusiasm for science in America than here in Britain. There is more enthusiasm for everything in America.
I believe there are no questions that science can't answer about a physical universe.
Some people would claim that things like love, joy and beauty belong to a different category from science and can't be described in scientific terms, but I think they can now be explained by the theory of evolution.
I'm never any good in the morning. It is only after four in the afternoon that I get going.
If we want to travel into the future, we just need to go fast. Really fast. And I think the only way we're ever likely to do that is by going into space.
I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.
I don't have much positive to say about motor neurone disease. But it taught me not to pity myself because others were worse off, and to get on with what I could still do.
Before I lost my voice, it was slurred, so only those close to me could understand, but with the computer voice, I found I could give popular lectures. I enjoy communicating science. It is important that the public understands basic science, if they are not to leave vital decisions to others.
Before we understand science, it is natural to believe that God created the universe.
God may exist, but science can explain the universe without the need for a creator.
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.