microcosm : (m.) jīvattqabhāva. (nt.) vissapatibima.
macrocosm : (f.) lokadhātu
Macrocosm and microcosm is an ancient Greek Neo-Platonic schema of seeing the same patterns reproduced in all levels of the cosmos, from the largest scale (macrocosm or universe-level) all the way down to the smallest scale (microcosm or sub-sub-atomic or even metaphysical-level). In the system the midpoint is Man, who summarizes the cosmos.
The Greeks were philosophically concerned with a rational explanation of everything and saw the repetition of the golden ratio throughout the world and all levels of reality as a step towards this unifying theory. In short, it is the recognition that the same traits appear in entities of many different sizes, from one man to the entire human population.
Macrocosm/microcosm is a Greek compound of μακρο- "Macro-" and μικρο- "Micro-", which are Greek respectively for "large" and "small", and the word κόσμος kósmos which means "order" as well as "world" or "ordered world."
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.
These passages describe the human being as a microcosm of the universe, having the essences of all things in him- or herself. As the microcosm, human beings have the foundation to know, use, and enjoy all things. Of all creatures, humans have the widest scope of thought and action, encompassing all things, knowing and appreciating all things, guiding and prospering all things, and transcending all things.
Each man is a microcosm of the universe. Your body is made of all the elements of the world. Nature supplied all the ingredients that make your body, which means that the universe made you by donating itself. If nature demanded that you refund everything that nature loaned you, would there be anything left of you? You can feel that the universe gave you birth and made you, so nature is your first parent.