The simplicity of this  will blow your mind.

Nothing leaves this plane/t.
When you die your body decomposes and becomes soil. The gasses and liquids in your body evaporate and become air wich goes back up into the clouds.
From conception every drop of water your mother drank and every fruit or vegetable she ate, came from the clouds and soil that nourished her.
From birth you are made up of these cells from those cycles that will forever recycle until the end of time. You drink the same water that fell on this earth at the beginning of its life.

I do believe in a soul and spirit.
But you can now see.
YOU ARE EVERY PERSON YOU'VE EVER MET.