My father was so ignorant I could hardly stand to have the old man around.

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

— Samuel Langhorne Clemens [Mark Twain] (US author and humorist, 1835 – 1910)