This particular, as well as the telepathic sense, may be cultivated or developed by anyone who wishes to take the time and trouble to accomplish the work. The principle is simple--merely the same principle that one uses in developing any of the other physical attributes, namely, use and exercise. The first step (a) is the recognition of the existence of the sense itself; then (b) the attention given to its reports; then (c) frequent use and exercise. Just think of how you would proceed to develop any of the five ordinary senses--the hearing, sight, or touch, for instance--then follow the same process in the cultivation of this extra sense, or two senses, and you will accomplish the same kind of results. Now, let us consider the other extra physical sense--the "telepathic" sense, or sense of becoming aware of the thought-waves, or emotional waves, of other persons. Now, as strange as this may appear to some persons--the most of persons in fact--this telepathic faculty is not a "higher" faculty or sense, but is really a comparatively low one. Just like the sense just described, it is possessed in a higher degree by many of the lower animals, and by primitive and savage man. That which really is "higher" in this kind of psychic phenomena is the manifestation of that higher form of telepathy--by use of the astral counterpart of this sense--which we shall consider, later, under the name of clairvoyance, for this is really a particular phase of clairvoyance. As strange as it may appear to some of you, the lower animals possess a kind of telepathic sense. An animal is usually aware of your feelings toward it, and your purposes regarding it. Domestic animals lose some of this by generations of confinement, while the wild animals have the sense highly developed. But even some of the domestic animals have more or less of it. You will readily recognize this fact if you have ever tried to "cut out" a certain animal from a herd or flock. You will find that the animal in some way has sensed your designs upon it, no matter how indirectly you approach it, and it will begin circling around the other animals, twisting in and out in its endeavors to be lost to your sight. The other animals, likewise, will seem to know that you are after only that particular one, and will manifest but little fright or distrust, comparatively.