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It is no small art to sleep: for that purpose you must keep awake all day.

— Friedrich Nietzsche, German philosopher

Man once surrendering his reason, has no remaining guard against absurdities the most monstrous, and like a ship without rudder, is the sport of every wind.

— Thomas Jefferson, Former US President

Anything that gives us new knowledge gives us an opportunity to be more rational.

— Herbert Simon,American economist

The educated differ from the uneducated as much as the living differ from the dead.

— Aristotle, Greek Philosopher

The test of a first rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

— F. Scott Fitzgerald, American Writer

The whole difference between construction and creation is exactly this: that a thing constructed can only be loved after it is constructed; but a thing created is loved before it exists.

— Charles Dickens, English Writer

What could an entirely rational being speak of with another entirely rational being?

— Emmanuel Levinas, French philosopher

Somewhere, something incredible is waiting to be known.

— Carl Sagan, American Astronomer

Study without desire spoils the memory, and it retains nothing that it takes in.

— Leonardo da Vinci, Italian Renaissance Artist

I strongly believe that fundamental science cannot be driven by instructional, industrial and government or military pressures.

— CV Raman, Indian Physicist
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