While this analogy is an interesting one, I think it misses the mark when it comes to describing the aging process. Aging is not merely a process of gradually decreasing productivity and energy. It is also a process of gaining wisdom and experience, of forming closer relationships with loved ones, and of becoming more comfortable with one's self. Furthermore, it is not necessarily true that one's productivity diminishes with age. It is certainly possible for individuals to remain productive and engaged in life throughout their later years. UrRong in suggesting that aging is simply a matter of gradually losing energy and productivity.
