The observer cannot be left out of the description of the observation.

Behind it all is surely an idea so simple, so beautiful, that when we grasp it - in a decade, a century, or a millennium - we will all say to each other, how could it have been otherwise? How could we have been so stupid?

There are many modes of thinking about the world around us and our place in it. I like to consider all the angles from which we might gain perspective on our amazing universe and the nature of existence.

Now is the time for everyone who believes in the rule of reason to speak up against pathological science and its purveyors.

The job of a theoretical physicist is to make mistakes as fast as possible .

We live on an island surrounded by a sea of ignorance. As our island of knowledge grows, so does the shore of our ignorance.

It is my opinion that everything must be based on a simple idea. And it is my opinion that this idea, once we have finally discovered it, will be so compelling, so beautiful, that we will say to one another, yes, how could it have been any different.