Physicists are more like avant-garde composers, willing to bend traditional rules... Mathematicians are more like classical composers.

Over the centuries, monumental upheavals in science have emerged time and again from following the leads set out by mathematics.

General relativity is in the old Newtonian framework where you predict what will happen, not the probability of what will happen. And putting together the probabilities of quantum mechanics with the certainty of general relativity, that's been the big challenge and that's why we have been excited about string theory, as it's one of the only approaches that can put it together.

Our eyes only see the big dimensions, but beyond those there are others that escape detection because they are so small.

I believe we owe our young an education that captures the exhilarating drama of science.

...quantum mechanics—the physics of our world—requires that you hold such pedestrian complaints in abeyance.

Science is the process that takes us from confusion to understanding.