Reposted Mark Purser's video.
I love to watch the ocean, seeing lines of oceanic swell pushing in and wrapping around a point of land, gives such a clear depiction of the nature of energy. The sun heats the air, creates wind, wind creates waves, energy flows in continual motion, changing forms yet always remaining constant in its manner. The nature of energy is movement.
This shot yesterday from the most Easterly point of the Australian mainland.