Look around you after a party the next time you have a chance.
Most likely, there will be a lot of “dead soldiers,” or empty beer bottles, lying around.
They are said to be dead because the alcohol, or spirit, has left their bodies.
The spirit, like the soul, was considered the independent and invisible essence of everything physical and is quite separate from the material fact.
A beer bottle without its alcohol has lost its spirit and, just like any other creation human or otherwise, has dearly departed.