I really like this meditation by Deng Ming-Dao, it addresses the actual physical component of our life. The geography of our existence as well as the very real impact our choices have on the future flow of our lives.
If the boulders are moved,
Even a river will change its flow.
Except for occasional flooding, the mightiest river keeps to its bed. It flows where it finds openings between cliffs and rocks. If the river is dammed, if the cliff walls are moved, if the boulders are shifted, it will flow a different course. It could even be made to flow backwards if the earth moved far enough.
So it is with the flow of our lives. Once the fixed objects of our lives shift, our circumstances change. If we move to another city, life will change. If we marry one person over another, life will be different. If we situate our business in a good neighborhood life will be prosperous. If we choose a house in a good setting, life will be healthy. If we arrange our furniture properly, life will be comfortable. If we eat correctly, life will be prolonged. In short, followers of Tao realize that the flow of life can be affected and to some degree consciously manipulated simply by altering its parameters.
Life is the flow of energy. It is the air that we breathe, the force that moves weather, the force of all minds combined. It keeps the rivers flowing, our hearts beating, and the sky blue. This flow of energy moves constantly according to the fixed points that exist at any given moment. Therefore, by manipulating the cardinal points of our lives, we can change the flow. The freedom to choose and to change belongs to us.