Posted this on Zen Forum International in response to a question about "death," and thought I would post it here as well:
Voyager -- Everyone meditates on death. This is because they meditate on what is alive and compelling. It may sound spooky or pessimistic (in The Dhammapada, Gautama was reported to have said, "All fear dying./All fear death."), but really, the more you investigate this moment, this life, the more natural it becomes ... this moment is gone (or dead, if you like) before anyone can get a handle on it. Simultaneously, of course, something new is born. Every moment is like this ... it's just up to us to bring our minds into accord with what happens all the time.
Intellectually or emotionally, this is easier said than done. But in practice, it happens without any real effort ... just like birth, just like death: Things begin (so to speak) and they end (so to speak). Emotion and intellect can never comprehend or be at ease with this flow, but Zen students can.
Just my take.