I want my books sold on airport bookstalls.

The idea of 10 dimensions might sound exciting, but they would cause real problems if you forget where you parked your car.

The human race does not have a very good record of intelligent behavior.

The doctor who diagnosed me with ALS, or motor neuron disease, told me that it would kill me in two or three years.

One does not have to appeal to God to set the initial conditions for the creation of the universe, but if one does He would have to act through the laws of physics.

Before we understand science, it is natural to believe that God created the universe. But now science offers a more convincing explanation.

The downside of my celebrity is that I cannot go anywhere in the world without being recognized. It is not enough for me to wear dark sunglasses and a wig. The wheelchair gives me away.