Source Unknown
"At sixteen I was stupid, confused and indecisive. At twenty-five I was wise, self-confident, prepossessing and assertive. At forty-five I am stupid, confused, insecure and indecisive. Who would have supposed that maturity is only a short break in adolescence?"
Jules Feiffer
"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."
Josh Billings
"You can't leave footprints in the sands of time if you're sitting on your butt. And who wants to leave buttprints in the sands of time?"
Source Unknown