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 the old man had learned in seven years.
Mark TwainDer Spruch darf mit Autorenangabe frei verwendet werden, da die urheberrechtliche Schutzfrist abgelaufen ist († 21. April 1910) Zur Autorenbiographie