Law of conservation of energy - a voice comes from a person

"Only when you think outside the box...will new discoveries be found." Albert Einstein and friends

Image credit: chaospet.

In physics, the law of conservation of energy states that the total energy of an isolated system remains constant—it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it transforms from one form to another.

Everyday equivalents are:

- There’s no such thing as a free lunch.

- No pain. No gain.

- You can’t get something from nothing. 

...which translates to... 

An inside voice comes from a person who has a location.

An outside thought comes from a person who has a location.

A voice or a thought originates from a person, a physical body is optional.

As for the location, it can be anywhere.

 

You can not create a unique voice out of thin air. It belongs a person.

Update: 2017 April 4 - Fix for to from

2020 November 28 - changed format, added pic