I like physics, but I love cartoons.

I don't want to write an autobiography because I would become public property with no privacy left.

Scientists have become the bearers of the torch of discovery in our quest for knowledge.

All that my work has shown is that you don't have to say that the way the universe began was the personal whim of God.

If we ever do find a complete theory of the universe, it would be a great triumph of human reason but it wouldn't leave much for us to do. We need an intellectual challenge.

Obviously, because of my disability, I need assistance. But I have always tried to overcome the limitations of my condition and lead as full a life as possible. I have traveled the world, from the Antarctic to zero gravity.

The increase of disorder or entropy with time is one example of what is called an arrow of time, something that distinguishes the past from the future, giving a direction to time.