As the water cascades down it encounters problems - rocks, plants and other water. These problems are what cause the water to find another path to reach the pool at the bottom. That path might require running over the edge of the rock and pouring into mid air creating the beauty of the waterfall.
The still pool at the bottom is not the end of the journey for the water, nor the end of it's obstacles. As the water flows down the river it finds more rocks on the river bed. As it flows it has to build strength to get itself over the rocks. The rocks filter the water, leaving it to continue it's journey cleaner and flowing with more power and strength.
You are that water trying to flow through life. As you encounter obstacles, be as the water and build strength to overcome them. If the first path you choose to your goals does not succeed, find another. You might need to take a leap into mid-air. But that leap might create something beautiful. You can still reach the same goal via a different route.
Life will continue flowing and there is no sense in lying still in a pool. Flow with life and wash over your rocks.

