Free will is the sensation of making a choice. The sensation is real, but the choice seems illusory. Laws of physics determine the future.

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

Sometimes nature guards her secrets with the unbreakable grip of physical law. Sometimes the true nature of reality beckons from just beyond the horizon.

But, as Einstein once said, “For we convinced physicists, the distinction between past, present, and future is only an illusion, however persistent.”5

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

Art makes us human, music makes us human, and I deeply feel that science makes us human.

I’ve spent something like 17 years working on a theory for which there is essentially no direct experimental support.

Gravity is matter’s sugar daddy.

Physicists have come to realize that mathematics, when used with sufficient care, is a proven pathway to truth.

No matter how hard you try to teach your cat general relativity, you're going to fail.

The bottom line is that time travel is allowed by the laws of physics.

The boldness of asking deep questions may require unforeseen flexibility if we are to accept the answers.

Energy is the ultimate convertable currency.

Experimental evidence is the final arbiter of right and wrong.

All you are is a bag of particles acting out the laws of physics. That to me is pretty clear.

Understanding requires insight. Insight must be anchored.

When kids look up to great scientists the way they do to great musicians and actors, civilization will jump to the next level

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

Exploring the unknown requires tolerating uncertainty.