Ambrose Bierce
In our civilization, and under our republican form of government, intelligence is so highly honored that it is rewarded by exemption from the cares of office.

Ambrose Bierce
Mad: Affected with a high degree of intellectual independence;

Calvin Coolidge Quote - Intelligence is given every wise opportunity to develop. -
Calvin Coolidge
Intelligence is given every wise opportunity to develop.

Charles Darwin
I feel most deeply that the whole subject is too profound for the human intellect. 

Charles Bukowski
An intellectual is a man who says a simple thing in a difficult way; an artist is a man who says a difficult thing in a simple way.

Charles Bukowski
The problem with the world is that the intelligent people are full of doubts. While the stupid ones are full of confidence.

George Carlin
The IQ and the life expectancy of the average American recently passed each other in opposite directions.

Gilbert K. Chesterton
There is a road from the eye to the heart that does not go through the intellect. Men do not quarrel about the meaning of sunsets; they never dispute that the hawthorn says the best and wittiest thing about the spring.

Isaac Asimov
Those people who think they know everything are a great annoyance to those of us who do.

James A Baldwin
You don't realize that you're intelligent until it gets you into trouble.