Only two things are infinite, the universe and human stupidity, and I’m not sure about the former. (Albert Einstein)

It is much more comfortable to be mad and know it, than to be sane and have one’s doubts. (G. B. Burgin)

A people that values its privileges above its principles soon loses both. (Dwight D. Eisenhower , Inaugural Address, January 20, 1953)

Try to learn something about everything and everything about something. (Thomas Henry Huxley)

When one person suffers from a delusion it is called insanity; when many people suffer from a delusion it is called religion. (Robert Pirsig)

A friendship founded on business is better than a business founded on friendship. (John D. Rockefeller)

Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity. (Martin Luther King Jr.)

Facts are the enemy of truth. (Don Quixote – Man of La Mancha)

Everybody pities the weak; jealousy you have to earn. (Arnold Schwarzenegger)

Against stupidity, the gods themselves contend in vain. (Friedrich von Schiller)