Emptiness is the dark womb of creation. Rhythm refers to balance of opposiing forces.
Essence of Being is complete peace and stillness. Emptiness is also linked to the creative Void, meaning that it is a state of complete receptivity and perfect enlightenment. It represents the disappearance of, or more precisely the merging of, the ego with its own essence, which in Western tradition is called the Universal Soul or the Unknown God, and in Buddhism is called the Clear Light.
Reality changes all the time. Reality is part of life as it brings the necessary changes and meanings that we all need to express ourselves.