Furthermore, there is in the world a vast number of things, from the simplest and most crude instruments, to the most intricate and cunning devices which have been constructed by the hand of man. These reveal the fact of man's thought and ingenuity. Thought must have a source as well as formand feeling. We saw that it was necessary to have the requisite material in order to build a steam engine or a body and we reasoned from the fact that in order to obtain material to express desire there must also be a world composed of desire stuff. Carrying[pg 058]our argument to its logical conclusion, we also hold that unless a World of Thought provides a reservoir of mind stuff upon which we may draw, it would be impossible for us to think and invent the things which we see in even the lowest civilization.

Thus it will be clear that the division of a planet into worlds is not based on fanciful metaphysical speculation, but is logically necessary in the economy of nature. Therefore it must be taken into consideration by any one who would study and aim to understand the inner nature of things. When we see the street cars moving along our streets, it does not explain to say that the motor is driven by electricity of so many amperes at so many volts. These names only add to our confusion until we have thoroughly studied the science of electricity and then we shall find that the mystery deepens, for while the street car belongs to the world of inert formperceptible to our vision, the electric current which moves it is indigenous to the realm of force, the invisible Desire World, and the thought which created and guides it, comes from the still more subtile World of Thought which is the home world of the human spirit, the Ego.

It may be objected that this line of argument makes a simple matter exceedingly intricate, but a little reflection will soon show the fallacy of such a contention. Viewed superficially any of the sciences seem extremely simple; anatomically we may divide the body into flesh and bone, chemically we may make the simple divisions between solid, liquid and gas, but to thoroughly master the science of anatomy it is necessary to spend years in close application and learn to know all the little nerves, the ligaments which bind articulations between various parts of the bony structure, to study the several kinds of tissue and their disposition in our system where they form the bones, muscles, glands, etc., which in the aggregate we know as the human body. To properly understand the science of chemistry we must study the valence of the atom which determines the power of combination of the various elements, together with other niceties, such as atomic weight, density, etc. New wonders are constantly opening up to the most experienced chemist, who understands best the immensity of his chosen science.