A significant feature of energyforms is that they move and react to vibration and rhythm. Gravity, light, sound and heat move through space in rhythmical wavepatterns, electrons, planets and galaxies circle in rhythmical motion. Even the most obvious manifestations of our lifeenergy such as heartbeats and breathing are rhythmical. It seems that even the essence of energy can be experienced as a rhythm and vibration. It should be kept in mind that our physical senses are not capable of grasping this rhythm since this energy by definition cannot be materially defined. At that point we are abandoning the area of the objective science of exterior forms and explore the subjective science of inner reality.