Thus these particular components all share an essential quality daytime, light, warmth, activity and the sun. On the other hand there is nighttime, darkness, cold, rest and the moon, all of which share in an essential quality that is opposite in nature to the former. One opposite has certain distinctive relationships with the other in any given pair. They can be seen as two alternating states of development or two aspects of a cyclical movement through time. The planet Earth is divided into oceans and land masses.
Life forms are mobile or immobile, warm blooded or cold-blooded.
The body can be regarded as consisting of an exterior portion of skin and skeletal muscle and an interior portion of viscera and bones. Yin-Yang terminology is used when describing the nature or characteristic tendency of one thing with reference to another. Linguistically, it often appears that these terms are used as nouns, however it should always be understood that Yin-Yang are adjectives and do not refer to any concrete or existing thing. There is always some degree of the opposite contained in anything that exists, no matter how extreme the degree of Yin or Yang. Whatever is conceived would simply expand to infinity, ie.