Microcosm–macrocosm analogy
The microcosm–macrocosm analogy (or, equivalently, macrocosm–microcosm analogy) refers to a historical view which posited a structural similarity between the human being (the , i.e., the "small order" or the "small universe") and the cosmos as a whole (the , i.e., the "great order" or the "great universe"). Given this fundamental analogy, truths about the nature of the cosmos as a whole may be inferred from truths about human nature, and vice versa. One important corollary of this view is that the cosmos as a whole may be considered to be alive, and thus to have a mind  or soul (the world soul), a position advanced by Plato in his "Timaeus". Moreover, this cosmic mind or soul was often thought to be divine, most notably by the Stoics and those who were influenced by them, such as the authors of the "Hermetica". Hence, it was sometimes inferred that the human mind or soul too was divine in nature. Apart from this important psychological and noetic (i.e., related to the mind) application, the analogy was also applied to human physiology. For example, the cosmological functions of the seven classical planets were sometimes taken to be analogous to the physiological  functions of human organs, such as the heart, the spleen, the liver, the stomach, etc. The view itself is ancient, and may be found in many philosophical systems world-wide, such as for example in ancient Mesopotamia, in ancient Iran, or in ancient Chinese philosophy. However, the terms microcosm and macrocosm refer more specifically to the analogy as it was developed in ancient Greek philosophy and its medieval and early modern descendants. In contemporary usage, the terms microcosm and macrocosm are also employed to refer to any smaller system that is representative of a larger one, and vice versa. History . Antiquity. Among ancient Greek and Hellenistic philosophers, notable proponents of the microcosm–macrocosm analogy included Anaximander (), Plato (), the Hippocratic authors (late 5th or early 4th century BCE and onwards), and the Stoics (3rd century BCE and onwards). In later periods, the analogy was especially prominent in the works of those philosophers who were heavily influenced by Platonic and Stoic thought, such as Philo of Alexandria (), the authors of the early Greek "Hermetica" (), and the Neoplatonists (3rd century CE and onwards). The analogy was also employed in late antique and early medieval religious literature, such as in the "Bundahishn", a Zoroastrian  encyclopedic work, and the "Avot de-Rabbi Nathan", a Jewish Rabbinical text. Middle Ages. Medieval philosophy was generally dominated by Aristotle, who despite having been the first to coin the term "microcosm", had posited a fundamental and insurmountable difference between the region below the moon (the sublunary world, consisting of the four elements) and the region above the moon (the superlunary world, consisting of a fifth element). Nevertheless, the microcosm–macrocosm analogy was adopted by a wide variety of medieval thinkers working in different linguistic traditions: the concept of microcosm was known in Arabic as , in Hebrew as , and in  Latin as or . The analogy was elaborated by alchemists such as those writing under the name of Jabir ibn Hayyan (), by the anonymous Shi'ite philosophers known as the Ikhwān al-Ṣafāʾ ("The Brethren of Purity", ), by Jewish theologians and philosophers such as Isaac Israeli (), Saadia Gaon (882/892–942), Ibn Gabirol (11th century), and Judah Halevi (), by Victorine monks such as Godfrey of Saint Victor (born 1125, author of a treatise called "Microcosmus"), by the Andalusian mystic Ibn Arabi (1165 – 1240), by the German cardinal Nicholas of Cusa (1401 – 1464), and by numerous others. Renaissance. The revival of Hermeticism and Neoplatonism in  the Renaissance, both of which had reserved a prominent place for the microcosm–macrocosm analogy, also led to a marked rise in popularity of the latter. Some of the most notable proponents of the concept in this period include Marsilio Ficino (1433 – 1499), Heinrich Cornelius Agrippa (1486 – 1535), Francesco Patrizi (1529 – 1597), Giordano Bruno (1548 – 1600), and Tommaso Campanella (1568 – 1639). It was also central to the new medical theories propounded by the Swiss physician Paracelsus (1494 – 1541) and his many followers, most notably Robert Fludd (1574 – 1637). Andreas Vesalius (1514 – 1564) in his anatomy text "De fabrica" wrote that  the human body "in many respects corresponds admirably to the universe and for that reason was called the little universe by the ancients." Bibliography. Further reading. The following works contain general overviews of the microcosm–macrocosm analogy: