Skill is successfully walking a tightrope between the twin towers of New York's World Trade Center. Intelligence is not trying.

It has always been my private conviction that any man who puts his intelligence up against a fish and loses had it coming.

An intelligence test sometimes shows a man how smart he would have been not to have taken it.

The universe is an intelligence test.

Intelligence is a moral category.

There can be no two opinions as to what a highbrow is. He is the man or woman of thoroughbred intelligence who rides his mind at a gallop across country in pursuit of an idea.

Intelligence is quickness in seeing things as they are.

The intelligence of the creature known as a crowd is the square root of the number of people in it.

To educate the intelligence is to expand the horizon of its wants and desires.

Intelligence is not to make no mistakes but quickly to see how to make them good.