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The mind is not a vessel to be filled but a fire to be kindled.
Plutarch
The surest sign that intelligent life exists elsewhere in the universe is that it has never tried to contact us.
Bill Watterson
The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.
F. Scott Fitzgerald
The true sign of intelligence is not knowledge but imagination.
Albert Einstein
There are no great limits to growth because there are no limits of human intelligence, imagination, and wonder.
Ronald Reagan
There are only two races on this planet - the intelligent and the stupid.
John Fowles
There is no greater evidence of superior intelligence than to be surprised at nothing.
Josh Billings
There is no method but to be very intelligent.
T. S. Eliot
There is nobody so irritating as somebody with less intelligence and more sense than we have.
Don Herold
To be able to fill leisure intelligently is the last product of civilization.
Arnold J. Toynbee
We have now sunk to a depth at which restatement of the obvious is the first duty of intelligent men.
George Orwell
We should take care not to make the intellect our god; it has, of course, powerful muscles, but no personality.
Albert Einstein
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
Sigmund Freud
Wit is educated insolence.
Aristotle
Your intellect may be confused, but your emotions will never lie to you.
Roger Ebert