There are only two races on this planet -- the intelligent and the stupid.

Intelligent people know they are intelligent. They also know that one person cannot know all, hence a person is not stupid simply because he is ignorant of one thing or another. They know that, to another intelligent person, they will not appear stupid in asking for an explanation of what they do not know, and so their ignorance on any particular issue does not become an embarrassment.

An intelligent hell would be better than a stupid paradise.

The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.

The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.

The real war is not between the West and the East. The real war is between intelligent and stupid people.