[AntonioLao]

The metaphysical concept of the human soul is conceptually identical and hence physically equivalent to the physical concept of time. This equivalence can be described by using spacetime formalism with the additional boundary condition that time, like space must be multidimensional (multidirectional).

In order to describe the intimate geometrical connection, it is necessary to bring the double light cone from the theories of relativity into our discussion. Now we begin by saying that each person has a soul and that each person also has a unique light cone. It is the combined uniqueness of each soul and each light cone that make up an individual. Since light cone and soul are now assumed equivalent, from this point on, we will only talk all about light cones.

The geometry of the light cone separates the past and the future for a particular person. The vertex of the light cone represents the extended present moment, the now. This now moves along a worldline that is found within the super light cone of the entire universe. Each light cone, big or small, regular or super, has a unique time axis. For an average human being, the metric (length of unit vector) of this time axis represents the average lifespan of the person. By using the perspective of an expanding sphere centered at the vertex of the light cone, the lifespan is represented by the radius of the sphere. When a person dies, the sphere ceased expanding but its time axis remains to exist by aligning itself with the super time axis of the universal super light cone. The maximum scattering angle of each person’s time axis from the super time axis of the entire universe is set at 45 degrees. If a person’s time axis is exactly 45 degrees from the super axis then this person lives forever, living in the form of pure energy similar to the photons. At zero degree, the person is dead but its soul’s axis is aligned with the super time axis of the universe. Due to some flukes of the universe, such as quantum fluctuations of the vacuum, there is a chance that the time axis of a soul becomes de-align from the super axis and the soul will be reborn into human form again and the cycle of alignment and de-alignment continues forever in an everlasting process of birth and rebirth toward the end of eternity.