Man is so intelligent that he ...

Man is so intelligent that he feels impelled to invent theories to account for what happens in the world. Unfortunately, he is not quite intelligent enough, in most cases, to find correct explanations. So that when he acts on his theories, he behaves very often like a lunatic.
Man is so intelligent that he feels impelled to invent theories to account for what happens in the world. Unfortunately, he is not quite intelligent enough, in most cases, to find correct explanations. So that when he acts on his theories, he behaves very often like a lunatic.

Quotes from the same author

Experience is not what happens to you; it's what you do with what happens to you.
Experience is not what happens to a man. It is what a man does with what happens to him.
There is only one corner of the universe you can be certain of improving, and that's your own self.
Technological progress has merely provided us with more efficient means for going backwards.
No man ever dared to manifest his boredom so insolently as does a Siamese tomcat when he yawns in the face of his amorously importunate wife.