23 THE LAW OF PSYCHIC PHENOMENA.
tations, a conception of which Schelling says : " The philosophy of mythology proves that a trinity of divine potentialities is the root from which have grown the religious ideas of all nations of any importance that are known to us."
In later times, Swedenborg, believing himself to be divinely inspired, declared that "There appertain to every man an internal man, a rational man, and an external man, which is properly called the natural man." Again, he tells us that there are three natures, or degrees of life, in man, "the natural, the spiritual, and the celestial."
Of modern writers who accept the dual theory, Professor Wigan, Dr. Brown-Sequard, and Professor Proctor are notable examples. Numerous facts are cited by these writers, demonstrating the broad fact of duality of mind, although their theory of causation, based on cerebral anatomy, will not bear a moment's examination in the light of the facts of hypnotic science.
In more recent years * the doctrine of duality of mind is beginning to be more clearly defined, and it may now be said to constitute a cardinal principle in the philosophy of many of the ablest exponents of the new psychology.
Thousands of examples might be cited to show that in all the ages the truth has been dimly recognized by men of all civilized races and in all conditions of life. Indeed, it may be safely predicated of every man of intelligence and refinement that he has often felt within himself an intelligence not the result of education, a perception of truth independent of the testimony of his bodily senses.
It is natural to suppose that a proposition, the substantial correctness of which has been so widely recognized, must not only possess a solid basis of truth, but must, if clearly understood, possess a veritable significance of the utmost importance to mankind.
Hitherto, however, no successful attempt has been made
1 Since the above was written, Du Prel's able and interesting work, entitled "The Philosophy of Mysticism," has appeared, in which the dual theory is demonstrated beyond question by reference to the phenomena of dreams.