Imagination will often carry us to worlds that never were. But without it we go nowhere.
We've arranged a civilization in which most crucial elements profoundly depend on science and technology.
It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.
The dangers of not thinking clearly are much greater now than ever before. It's not that there's something new in our way of thinking it's that credulous and confused thinking can be much more lethal in ways it was never before.
We're in very bad trouble if we don't understand the planet we're trying to save.
When you make the finding yourself even if you're the last person on Earth to see the light you'll never forget it.
I can find in my undergraduate classes, bright students who do not know that the stars rise and set at night, or even that the Sun is a star.
Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.
All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year. Not all bits have equal value.
The universe is not required to be in perfect harmony with human ambition.
Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people.
I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students.
Science is a way of thinking much more than it is a body of knowledge.
The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.