I have become fascinated with quotes lately ... little snippits from various authors, writers, philosophers, self-help gurus and assorted people who make one-sentence observations about life. I heard this one during a television show this week. It was not written for the show; it just happened to be quoted during the show.
In youth we learn; in age we understand.
Marie Ebner von Eschenbach
(an Austrian author who wrote psychological novels in the late 1800s)