Relative positions.

As I walk home at night, these days, I notice that the moon is getting fatter every day. What a dramatic change! To think that shifts in the relative positions of the moon, the sun, and the earth brings about this salient transition gives me a deep shudder. What marvelous manifestations of existence!

We tend to think that life occupies a privileged position in the universe. To some extent that feeling is justified. Ultimately, however, that is perhaps an deep-rooted ignorance, if one reflects on great alternations of things, like the moon shape change.
Life is about movement, and movement is about the passage of time. Entities in the space-time structure is never at rest. Life as we call it is only a subset of that great multitude.

The cherry blossoms bloom and then wither. A person is born and dies. The wind blows and is then dispersed. Change is the only certain fact in this world.

"We sail within a vast sphere, ever drifting in uncertainty, driven from end to end."
Blaise Pascal