Some religion mentioned about 3 gods, these gods are the system for this world. You can relate few basic things that untouchable to this system.

1.  Creation, Protection, Termination.

2. Past, Future , Present.

3. Lenght, Wide, Heigth (We are living in 3 dimensions).

4. Mutualism, Commensalism, Paratism (3 main basic characters for living entity including    human)

These are only fews that i mentioned that can be linked to the 3 gods, or for me supreme system