It's all a matter of relativity

Cities are made up of people.
People are made up of organs.
Organs are made up of cells.
Cells are little cities...

Look at a cell. Well you can't as it's such a tiny little thing that we can't see it with the naked eye. You'd think that something so small couldn't have anything going on inside it? Wrong.

So maybe it could contain a few proteins that mill about inside, keeping it functioning and what not. True but not accurate.

There are hundreds and thousands of proteins within the cell. So many that we don't even know how many.

I liken it to a city. There are millions of people in your average city. Even Auckland city, not the most famous for its metropolitan vibe contains at least 1.4 million people. the majority of who serve some kind of  productive purpose. Let's say I'm a PhD student (because I am). When I wake up in the morning, I'm relying on everyone else having done their jobs as electrical engineers (so I can have a hot shower), farmers (so I can drink my much needed cafe latte), and bus drivers (so that I can make it to the lab).

Inside the neuronal cell, a particular protein is responsible for receiving 'messages' from neighbouring cells. Just like me, that protein has to get to its place of work on the neuronal membrane every day. To do this it has to rely on other 'bus driver' proteins to shuttle it to its destination. When it arrives, it needs other support workers to help it carry out its journey. Even the 'roads' that the protein travels on throughout the day need to be paved by other 'roadworker' proteins. Every protein inside the cell serves a purpose, or at the very least has a place in the society of this 'little city'.

If I was a protein, I would feel just like I do now: a single member of this large city. But if I was a galaxy, maybe I could say the same. I would avoid black holes on my gazillion light-year revolving journey around the universe, as unbeknownst to me, tiny little nebulae inside me condensed into solar systems infinitely smaller than myself.

Cities make up continents.
Continents make up planets.
Planets made up solar systems.
Solar systems make up galaxies.
Galaxies make up the universe...

To me, it seems to be a matter of relativity.