Gravity of Thoughts and deeds

Have you ever thought that why human beings are on planet Earth and till date no one discovered a human being on any other planet? Just think
I pondered and I have a totally different explanation to it.
As far as I know, only Earth has that gravitational force..what ever you throw..comes back to you! Thanks to Isaac Newton.
Similarly...we all are made to live on it only to realize that what ever we do will come back to us.
The big planet symbolizes lot of things ...we just have to realize.
Even a human being has that gravity..if I say human being ..then i am not mentioning the human body ..but something which is carry forwarded!!!