However difficult life may seem, there is always something you can do and succeed at.
People won't have time for you if you are always angry or complaining.
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 have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.
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.
Intelligence is the ability to adapt to change.
We are all now connected by the Internet, like neurons in a giant brain.
Even if it turns out that time travel is impossible, it is important that we understand why it is impossible.
No one undertakes research in physics with the intention of winning a prize. It is the joy of discovering something no one knew before.
One can't predict the weather more than a few days in advance.
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.
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.
One cannot really argue with a mathematical theorem.
If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans.
If I had to choose a superhero to be, I would pick Superman. He's everything that I'm not.
There are grounds for cautious optimism that we may now be near the end ofthe search for the ultimate laws of nature.
We are all different. There is no such thing as a standard or run-of-the-mill human being, but we share the same human spirit.
In my school, the brightest boys did math and physics, the less bright did physics and chemistry, and the least bright did biology. I wanted to do math and physics, but my father made me do chemistry because he thought there would be no jobs for mathematicians.
When one's expectations are reduced to zero, one really appreciates everything one does have.
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.