I'm pretty pleased with that title by the way... (yeah, I'm such a nerd...)
I just spent a few days in Yosemite, which is in the process of emerging from its winter state.
Whenever I'm there I spend lots of time around the waterfalls that call Yosemite their home, especially Upper and Lower Yosemite Falls, (for any of you that don't know Yosemite, along with Half Dome, these falls are the iconic images that people associate with the park).
Couple of mornings ago I was sitting on a rock with a view of both falls. I know this isn't true of all waterfalls, but waterfalls in Yosemite have water levels that fluctuate depending on the season. Right now, as the snow begins to melt on the peaks above the valley the rivers start to flow and the falls have water in them. Late summer the water begins to dry up and the falls have very little flowing over them. In autumn there is virtually no water running over the falls, and any trickle that may be left in late autumn freezes over as winter approaches. The next spring the cycle commences again.
No matter what season it is, or how much water is flowing over Upper and Lower Yosemite Falls, they are always called Yosemite Falls. Not only are they called that- they ARE that. It doesn't matter if there are thousands of gallons flowing over each minute or if there's none- they are always the Falls.
What's more, if I looked away from the Falls for a minute, or even a second, and then looked back, the water I saw flowing over was different water than the water I'd seen flowing over a minute before. But still, it's always Yosemite Falls.
How's that for another example of how there can be continual change and stability at the same time. I think it's a good one. I mean, how can you go wrong with waterfalls :)