I need to use imaginaries again to clear up at the minimum about forward and backward time. And I need to rely on the idea of time axis again. Be back as quickly as is humanly possible without stepping backward in the time axis.
This image is showing the 4D spacetime geometry for a surface of the 4D sphere. The vertical z-axis the eternal sleeping axis of universal time. The angle phi indicates the alignment between an indiividual time axis and the universal axis. At time of death, these axes aligned. All matter at the same time axis exist along the circumference of the latitude circle.
the x-axis and the y-axis of the image are the space axis. If the speed is light speed then all existence are along the equator. Subluminal speed exist at the upper hemisphere. The lower hemisphere exist for all antimatter.