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Time travel requires organizing all the mass in the universe in a very particular configuration. So good luck!

— Stanley Deser

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Space

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Since, in the long run, every planetary society will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring — not because of exploratory or romantic zeal, but for the most practical reason imaginable: staying alive.

Carl Sagan Pale Blue Dot: A Vision of the Human Future in Space (1994)

The stars awaken a certain reverence, because though always present, they are inaccessible; but all natural objects make a kindred impression, when the mind is open to their influence. Nature never wears a mean appearance.

Ralph Waldo Emerson Nature (1836)

Her blue eyes sought the west afar,
For lovers love the western star.

Walter Scott The Lay of the Last Minstrel (1805)

Einstein's space is no closer to reality than Van Gogh's sky.

Arthur Koestler The Act of Creation (1964)

Attribution

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