"When I was a boy of 14, my father was so ignorant I could hardly stand to have the old man around. But when I got to be 21, I was astonished at how much the old man had learned in seven years."

Mark Twain

Mark Twain, pseudônimo de Samuel Longhorne Clemens, (30 de Novembro de 1835, Flórida, Missouri, EUA - 21 de Abril de 1910, Redding, Connecticut, EUA); Escritor e humorista norte-americano.