In the category of Nature's Finer Forces must be included that class of manifestations which are generally known as Telepathy, Thought Transference, Thought Force, etc., all of which are based upon the fact that there is present in all such mental states as Thought, Emotion, Desire, etc., a certain rate of vibratory motion, which motion is capable of being radiated from the mind of the person manifesting them in such power and force that they may be registered with more or less distinctness upon the minds of other persons are at a greater or less distance from the first person. In the more common forms of its manifestation, such mental force or power is known as Thought Force, Mental Influence, etc., and in its more pronounced and less common phases it is known as Telepathy, Thought Transference, etc., but the basic principle is precisely the same in all of such cases, simple or complex though their manifestations may be. The Higher Forces. We may say here, frankly and plainly, however, that the advanced occultists regard this class of phenomena as comparatively simple and elementary, and therefore not fully entitled to be included in the same category with the higher phases of Nature's Finer Forces, such as, for instance, Clairvoyance, Psychometry, Communication with the Higher Planes, etc. But notwithstanding this, we are of the opinion that any and every one of the finer forces of nature, i.e., any of the forces which are over and above the plane upon which the ordinary senses of man, normally developed, ordinarily function and operate, should be placed in one general category of the Higher Forces of Nature, particularly in a work of this kind designed for the instruction of the general public upon these important subjects. Accordingly, these lesser manifestations of the finer forces in the natural world shall be carefully considered in this part of this book, so that the student may become acquainted with the scientific principles upon which they are based, and may be enabled to develop the power of manifesting such powers if he choose to do so; and that he may understand the nature of such forces and powers when they are manifested by other persons. Chitta, or Mind Substance.