Most religions are based on the concept of Spiritual World. Everyone can agree on more or less on the unicity of the material perceptible world. Our body have perceptible caracteristics that everybody can agree on. But what happens when we die? Our body has the same exact perceptible caracteristics in the instant before and after we die. We even hear about cases where "people have came back to life" after they were declared dead from tool assisted measurments. What happens when from one instant we are animated and the next we cease to be animated never to be animated again? From my readings of past religions, I have made a list of different beliefs about what/where that elusive imperceptible Anima/Spirit/Soul/Ghost can be found in us.
The breath,
The blood (the heart),
The semen (the bloodline), the DNA,
The mind,
The vital energy (electric or others).
Perosnaly I think that, if we have a Spirit, it won't be found in the space/time/mater/energy/information realm.
What do you think?