To forget one's purpose is the commonest form of stupidity.

As long as there are slaughterhouses there will be battlefields. A vegetarian diet is the acid test of humanitarianism.

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

In politics, stupidity is not a handicap.

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

Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.