It has often been observed that time seems to go faster as we grow older. Our birthdays arrive with increasing rapidity. Shortly after my fortieth birthday, I began to feel as if I were taking the garbage cans out to the curb every other morning. And with each ensuing decade this subjective sense of accelerating time, which a number of my older friends have also noted, has grown ever more prominent. It is as if we were afloat on a swiftly moving river, and each of those “important” birthdays, the ones that mark the decades of our lives, were another waterfall, whose drop and velocity have yet to be experienced.
Yet, from the vantage point of Zen teachings, neither birthdays nor waterfalls are quite what they appear to be. They are at once real and illusory. In his book Living by Vow the Soto Zen priest Shohaku Okumura has this to say about waterfalls:
A river flows past a place where there is a change of height, and a waterfall is formed. Yet there is no such thing as a waterfall, only a continuous flow of water. A waterfall is not a thing but rather a name for a process of happening. . . . We cannot distinguish where the waterfall starts and ends because it is a continuous process.*