When you are dissatisfied and would like to go back to youth, just think of Algebra.
The golden years are really just metallic years: gold in the tooth, silver in your hair, and lead in the rear.
Life would be infinitely happier if we could only be born at the age of 80 and gradually approach 18.
First you forget names, then you forget faces. Then you forget to pull your zipper up, then you forget to pull your zipper down.
One of the many things no one tells you about aging is that it is such a nice change from being young.