The attentive passerby happening upon the shoreline may notice the gentle flow or perhaps turbulence of the scene. Change is a constant. Nothing remains the same. Take a closer look. You will discover interesting, maybe unexpected things. The wave patterns on the surface may vary greatly. You may not understand why. You may not care to know. But, hidden behind the apparent random and chaotic motion there is a reason. Causality. Multiple forces creating "circumstances."