The forces which according to this explanation are communicated by the spheres to this sublunary world are four in number, viz., (a) the force which effects the mixture and the composition of the elements, and which undoubtedly suffices to form the minerals; (b) the force which supplies every growing thing with its vegetative functions; (c) the force which gives to each living being its vitality, and (d) the force which endows rational beings with intellect. All this is effected through the action of light and darkness, which are regulated by the position and the motion of the spheres round the earth. When for one instant the beating of the heart is interrupted, man dies, and all his motions and powers come to an end. In a like manner would the whole universe perish, and everything therein cease to exist if the spheres were to come to a standstill. The living being as such is one through the action of its heart, although some parts of the body are devoid of motion and sensation, as, e.g., the bones, the cartilage, and similar parts. The same is the case with the entire universe; although it includes many beings without motion and without life, it is a single being living through the motion of the sphere, which may be compared to the heart of an animated being. You must therefore consider the entire globe as one individual being which is endowed with life, motion, and a soul. This mode of considering the universe is, as will be explained, indispensable, that is to say, it is very useful for demonstrating the unity of God; it also helps to elucidate the principle that He who is One has created only one being. Again, it is impossible that any of the members of a human body should exist by themselves, not connected with the body, and at the same time should actually be organic parts of that body, that is to say, that the liver should exist by itself, the heart by itself, or the flesh by itself. In like manner, it is impossible that one part of the Universe should exist independently of the other parts in the existing order of things as here considered, viz., that the fire should exist without the co-existence of the earth, or the earth without the heaven, or the heaven without the earth. In man there is a certain force which unites the members of the body, controls them, and gives to each of them what it requires for the conservation of its condition, and for the repulsion of injury—the physicians distinctly call it the leading force in the body of the living being; sometimes they call it “nature.” The Universe likewise possesses a force which unites the several parts with each other, protects the species from destruction, maintains the individuals of each species as long as possible, and endows some individual beings with permanent existence. Whether this force operates through the medium of the sphere or otherwise remains an open question.