The Clock

What is it about winding down?
Graying hair defines our brow.
Energy seeps from wrinkly pores.
We think there is so much yet left to do.
Nervous that our time has but run its course.
Have we learned it all?
Or all that we cared to see;
Or maybe just that which was meant to be.
But then we realize all too late,
that we have forgotten,
much more than we ever learned.