The writer has deemed it advisable to preface his consideration of "Mind" in itself, as well as of Substance and Motion, with two chapters, the purpose of which will be to demonstrate that Mind, in some form or degree, is to be found in connection with all Things--and that Everything has Life--and that Mind is an accompaniment of all Life. To many the term "Mind" means only the "thinking quality" of man, or perhaps of the lower animals; and "Life" the property only of such organic creatures. For that reason it has been deemed advisable to point out that Life and Mind are found even in the lowest forms of substance--even in the inorganic world. In this chapter and from now on, the writer shall use the term "_the_ Mind," etc., to indicate the particular mental principle of the creature or thing--the bit of Mind that is segregated from the rest, and which each person thinks of as "mine," just as he thinks of "my" body, as distinguished from the universal supply of Substance. The term "Mind" will be used in its Universal sense. And, the writer intends to use Elmer Gates' term, "_Mentation_," in the sense of "effort; action; or effect; in or of, the Mind"--in short, "mental process." The word is useful and when one has learned to use it, he will prefer it to the more complicated terms. Remember, then, please--"Mentation" means "Mental Process." Mentation includes that which we call "Thought," as well as some more elementary forms of mental process that we are not in the habit of dignifying by the term, Thought, which latter we usually reserve for mental process of a higher order. So, then, "Mind" is the something of which one's particular Mind is composed; "The Mind" is that something possessed by one, by and through which he "thinks"; "Mentation" is mental process; and "Thought" is a advanced kind of Mentation. At least, the said words will be so employed in this book, from now on. In this chapter, you are asked to consider the fact that Life is Universal--that Everything is Alive. And, that Mind and Mentation is an attribute of Life, and that, consequently, Everything has Mind, and is able to express a degree of Mentation. Forms of Life, as we know them, are always seen as possessing two aspects, _viz._, (1) Body (Substance); and (2) Mentation (Mind). The two aspects are always found in combination. There may be living creatures who occupy bodies of so fine a form of Substance as to be invisible to the human senses--but their bodies would be "Substance" just as much as is the "body" of the granite rock. And, in order to "think," these beings would need to have a material something corresponding to the brain, though it be finer in quality than the rarest gas, vapor, of electric wave. No body, without Mentation; no Mentation without a body. This last is the invariable law of the world of Things. And naught but The Infinite--That-which-is-above-Things--can be exempt from that law.