While mentioning microcosm diet, which is vegan plus removing salt and pepper out of the diet, going to simpler foods, I research the word, microcosm. Macrocosm and microcosm refers to a vision of cosmos where the part (microcosm) reflects the whole (macrocosm) and vice versa. It is a feature "present in all esoteric schools of thinking", underlies practices such as astrology, alchemy and sacred geometry with its premise of "As Above, So Below." Today, the concept of microcosm has been dominated by sociology to mean a small group of individuals whose behavior is typical of a larger social body encompassing it. A microcosm can be seen as a special kind of epitome. Conversely, a macrocosm is a social body made of smaller compounds. In physics, scale invariance describes the same phenomenon, although the universe as a whole is not physically scale invariant according to the modern understanding. However, scale invariance does appear in some physical systems, such as electrical breakdown. This theory was initiated by Pythagoras who saw the cosmos and the body as a harmonious unity. He expressed this connection with his concept of microcosm and macrocosm. An epitome is a summary or miniature form, or an instance that represents a larger reality, also used as a synonym for embodiment. Epitomacy represents, "to the degree of." An abridgment differs from an epitome in that an abridgment is made of selected quotations of a larger work; no new writing is composed, as opposed to the epitome, which is an original summation of a work, at least in part. Many documents from the Ancient Greek and Roman worlds survive now only "in epitome", referring to the practice of some later authors (epitomators) who wrote distilled versions of larger works now lost. Some writers attempted to convey the stance and spirit of the original, while others added further details or anecdotes regarding the general subject. As with all secondary historical sources, a different bias not present in the original may creep in. Documents surviving in epitome differ from those surviving only as fragments quoted in later works and those used as unacknowledged sources by later scholars, as they can stand as discrete documents but refracted through the views of another author. Epitomes of a kind are still produced today when dealing with a corpus of literature, especially classical works often considered dense and unwieldy and unlikely to be read by the average person, to make them more accessible: some are more along the lines of abridgments.