We have to take into account the action of the mind upon the body and the action of the body upon the mind. Remember that death is always produced when the body is unable to hold the soul. It has lost the magnetism to hold the soul. Between these two is the mind. When the body is unable to hold the mind, the mind is functioning without the body and doesn't need the body; and the body desperately tries to hang onto it, and it doesn't have enough magnetism to hold it. So it is the magnetism of the body that keeps you in life, and one has to know how to draw this magnetism in. Food is one means of drawing in that kind of energy that manifests itself finally in magnetism. You could say that the body is a transformer of energy. Food that is a substance of the earth has passed through the process of your body and been transformed into a magnetic field.