“If time travel is possible, where are the tourists from the future?”

Do you ever wonder how much deeper the ocean would be without sponges?

There should be a better way to start a day than waking up every morning.

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

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.

Remember that no one succeeds alone. Never walk alone in your future paths.

People were always getting ready for tomorrow. I didn’t believe in that. Tomorrow wasn’t getting ready for them. It didn’t even know they were there.

The Nautilus was piercing the water with its sharp spur, after having accomplished nearly ten thousand leagues in three months and a half, a distance greater than the great circle of the earth. Where were we going now, and what was reserved for the future?

Devotion, fervor, longing! Those are my pillars. We have to be the bridge to the future.

Have you never heard what the wise men say: all of the future exists in the past.

Play on the frontiers of technology. Be ahead of the tomorrows.

There’s a lot more future in hamburgers than in baseball.

The most frequent cause of regret for what we have done is because its effects interfere with what we would do.