“We have made remarkable progress in the last hundred years, but if we want to continue, our future is in space.”

I have sold more books on physics than Madonna has on sex.

I don’t fear God- I fear His believers.

God abhors a naked singularity.

To confine our attention to terrestrial matters would be to limit the human spirit.

Once I wept for I had no shoes. Then I met a man with no feet, so I took his shoes. I mean, it wasn’t as if he was going to need them.

It is all right to make mistakes; nothing is perfect because with perfection, we would not exist.

What I have done is to show that it is possible for the way the universe began to be determined by the laws of science.

I regard the afterlife to be a fairy story for people that are afraid of the dark.

Nothing cannot exist forever.

Mankind’s greatest achievements have come about by talking and its greatest failures by not talking. It doesn’t have to be like this.

It is not clear that intelligence has any long-term survival value.

A person who smiles in the face of adversity, probably has a scapegoat.

I believe things cannot make themselves impossible.

Eternity is a long time, especially towards the end.

Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space.

I’m really easy to get along with once you see it my way.