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Even if some different theory is discovered in the future, I don’t think time travel will ever be possible. If it were, we would have been overrun by tourists from the future by now.

— Stephen Hawking

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Future

More quotes by Stephen Hawking

Although September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do.

The whole history of science has been the gradual realization that events do not happen in an arbitrary manner, but that they reflect a certain underlying order, which may or may not be divinely inspired.

A Brief History of Time (1988)

I still believe there are grounds for cautious optimism that we may now be near the end of the search for the ultimate laws of nature.

A Brief History of Time (1988)

Disorder increases with time because we measure time in the direction in which disorder increases.

A Brief History of Time (1988)

In a world that is in chaos politically, socially and environmentally, how can the human race sustain another 100 years?

All Stephen Hawking quotes →

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A generation which ignores history has no past —and no future.

Robert A. Heinlein Time Enough for Love (1973)

From now on, everything in life will appear blurry to me. What’s the point of wiping my glasses when my vision has already left me?"

Sanu Sharma

You can never plan the future by the past.

Edmund Burke A Letter to a Member of the National Assembly (1791)

If we don’t care about our past we can’t have very much hope for our future.

Jacqueline Kennedy Onassis

Attribution

Quote text and notes from Wikiquote: Stephen Hawking (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.