Several quotes about intelligence.

Character is higher than intellect. A great soul will be strong to live as well as think.

Ralph Waldo Emerson

An intelligent person is never afraid or ashamed to find errors in his understanding of things.

Bryant H. McGill

The difference between stupidity and genius is that genius has its limits.

Albert Einstein

Action is the real measure of intelligence.

Napoleon Hill

There are no great limits to growth because there are no limits of human intelligence, imagination, and wonder.

Ronald Reagan

An intellectual is a man who takes more words than necessary to tell more than he knows.

Dwight D. Eisenhower