The relation between the spirit and the body can be likened to the relation between electrical power and a factory operating by electricity. If there is no electricity to operate the factory, the factory will be reduced to heap of junk. Likewise, when the spirit leaves the body because of some rupture or disconnection, which we call illness or something like that, despite his matchless value when alive, man is reduced to mass of tissue and bone to decompose in earth. This means that man's real existence and his uniqueness among beings depend on his spirit.