It's not that I'm so smart, it's just that I stay with problems longer.
Albert Einstein

Mad, adj. Affected with a high degree of intellectual independence.
Ambrose Bierce

Man becomes man only by his intelligence, but he is man only by his heart.
Henri Frederic Amiel

Smartness runs in my family. When I went to school I was so smart my teacher was in my class for five years.
Gracie Allen

The bookful blockhead, ignorantly read With loads of learned lumber in his head.
Alexander Pope

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 is no greater evidence of superior intelligence than to be surprised at nothing.
Josh Billings

There is nobody so irritating as somebody with less intelligence and more sense than we have.
Don Herold

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