ELI5: Explain Like I'm 5

Microcosm–macrocosm analogy

In the microcosm-macrocosm analogy, the macrocosm is like a grown-up and the microcosm is like a little kid. A macrocosm is a large thing that is like an entire universe with lots of different parts and people inside it. For example, our world is like a macrocosm. A microcosm is a small version of the macrocosm. It has the same kinds of parts, just in a smaller size. For example, a family is like a microcosm because it is made up of different people, just like the world is. The microcosm-macrocosm analogy is based on the idea that what's true for the smaller thing (the microcosm) is also true for the bigger thing (the macrocosm). So, when something happens in the microcosm, it can help us understand what might happen in the macrocosm.