Nobody grows old merely by living a number of years. We grow old by deserting our ideals. Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul.
It's all too easy to fall into the same old routines, and lose sight of the big picture (or spend too much time watching small pictures on television). It has been years since I last pushed my mind to its meager limits, and, in my isolation, my enthusiasm has waned. So I turn to writing in the hope that I can reopen my mind.