Hermann Lefeldt a competent teacher and researcher of the Hamburg School Astrology, found a connection between “sum and halfsum,” Lefeldt put force the hypothesis, that the sum stands for the inner and the halfsum for the outer, the form. I just have spoken that “inner things” need a “form” and we have seen, that the inner - the contents mostly have the greater value. The inner of the human beeing, is the best example because our soul an spirit are immortal, whereas the body is mortal. Astrology is not exhausted by knowing the technic alone. We must know the sence of life, we need a philosophy of life and also our own experience of life, if we are going to give advice to our clients for difficult and  serious questions concering the life.

Indian philosophy describes our body as a "vehicle." This mode of expression surprises us at first; however upon a more exact consideration it seems very significant if we employ the concept "locomotion-means" for vehicle. Our visible body, the vehicle, is also an outside for the inner immortal and invisible part of us: Soul and spirit MC + PO. Lefeldt called this inner part: “devine spark.” If we follow this hypothesis for “sum and halfsum,” we can draw the conclusion:

When the “devine spark” leaves the body during the dying-hour, then it  lives outside of the body and changes into the halfsum MC/PO.