The spirit inside human body is a form of energy
Once u are physically dead
The soul leaves the vessel
Ur soul will be floating
Following others aimlessly because there is no tour guide... every soul just float until they discover the exit
Those sinful one will have bad energy and usually attracted to repeat violent forms of actions
And they are prone to be captured by animals on birth
And rebirth became Animal including human
Those vengeful one escaped and haunt certain place forever unless someone can change the form of their energy back to normal like sorcery/bomoh/bodoh
Those good spirit will eventually reach Nirvana
True story