There is a vedic concept - एकैको वै जनतायामिन्द्रः

A planet and its satellites.

Planet at the centre and the satellites moving around it.

Sun at the centre of the Solar system and the planets moving around the Sun.

The boss at the office and the subordinates around him.

Political party: the central high command and the various state units and local units functioning as per the directions of the central command.

The Police commissioner and the officers and constables executing his orders.

This is the universal system that applies everywhere.

The captain on the ship and the other staff following his orders.

Commander of the army and the soldiers obeying orders.

The Karmatma, atma that has taken birth to undergo certain experiences as a result of the past deeds and the various organs of the body, the sensory organs, mind functioning to generate that experience.

The Mukhya prana, the central energy of the body and the other pranas such as prana, apana, vyana all functioning depending on the Mukhya prana.

Eyes at the centre and all the visuals happening around the eye.

This is how the whole world functions.

This is a major concept pertaining to the created world.

That every system needs a core a centre around which it is built.

Even an atom has a nucleus.

Even a virus has a centre around which it is built.

In the Vedas, Indra means this centre, this core.

Just like at the core of a kingdom a king is there.

The whole kingdom with millions of activities function around him, with the king at their core.

If the king disappears, then it is anarchy.

The whole system collapses.

Immediately after creation, there was no king.

Then it was complete anarchy.

Then people went to Brahma and said: we need a king, otherwise we will perish.

Then Brahma gave them the first king, Manu.

Then order came in the world.

Indra stands for this central ruler who is at the core.

In the state before creation there is no such core.

That is why the state before creation is compared to liquid.

A liquid doesn't have a core.

It assumes the shape of the vessel that holds it.

When we do parishechana we say: satyam tvartena parishindchami, ritam tva satyena parishinchami.

Satya and Rita are the two states.

Satya has a core.

Rita has no core; like liquid.

The manifested world is Satya.

The unmanifest world is Rita.

They keep on altering.

Satya for 4.32 billion years.

Then Rita for 4.32 billion years.

Again Satya, again Rita.

Meals during the day, you say: satyam tvartena parishinchami.

Encompassing Satya with Rita which is to come after pralaya.

You are saying this during the day, when the world is visible.

In the night nothing is visible.

Then during night meals you say: ritam tva satyena parishinchami.

Encompassing Rita with Satya.

Creation will happen again.

Be aware of this.

This is the whole purpose of parishechana.

To be aware of this on a daily basis.

People give stupid explantions like parishechana is to prevent insects from getting ito the food.

You are pouring water around the food so that insects don't enter.

See how misguided and confused we are.