A recent movie, 21 Grams, takes its title from a theory around 1900 that the human soul weighs 21 grams. Some guy supposedly weighed bodies before and after death to reach that conclusion.
Obviously the theory didn't catch on; e.g., did you ever hear of it previously?
I mentioned this as an interesting farout sermon possibility to a preacher friend, but he said that was new to him and immediately dissed the idea with several Biblical quotations.
I was present when my Mother and my Father-in-Law died several years apart, and was impressed with the departure of life (i.e., spirit, soul, animus, energy) and how their corpses literally were just shells of what they were, temporary Earthly vehicles for their life force.
Instead of opening another discussion about life and death and souls, let's confine this one to a more secular topic: can everything be weighed and measured, including all energy, light, air, heat, anything you can think of?
Conversely, is there anything we can perceive or imagine that cannot be weighed and measured in some form, however fine, e.g., trillionth of a gram and smaller?
And if you simply must foray into Lala Land, okay, share some quantification vibes about the life force, spirit, animus, soul.
