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

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

I have nothing to declare except my genius. (Oscar Wildeupon arriving at U.S. customs 1882)

Each problem that I solved became a rule which served afterwards to solve other problems. (Rene Descartes, Discours de la Methode)