... the sun, moon and stars,—earth and sea, mountains and rivers, occupy prominent places. To facilitate our knowledge of these, and prompt reference to any part of them, we generalize or throw them into groups. Thus we speak familiarly of the "solar system," the "animal, vegetable or mineral kingdom." Now, just transfer these systematized objects from the material and physical, to the moral and spiritual world. Then consider what relation any one object bears to the system, and what influence it has upon the other objects of which it is a part, and its import may ... — Notes On The Apocalypse • David Steele