A writer on the subject has said: "Psychologists have pointed out to us the fact that if a human being were born without sense organs, no matter how perfect a brain he might have, his life would be little more than that of a plant. Such a person would exist merely in a dreamlike state, with only the very faintest manifestations of consciousness. His consciousness would not be able to react in response to the impact of sensations from the outside world, for there would be no such impact. And as consciousness depends almost entirely upon the impact of, or resistance to, outside impressions, his consciousness would be almost entirely inactive. He would be conscious of his own existence, but would probably never realize the fact fully, for he would have nothing else with which to compare himself, and his self-consciousness would never be aroused by contact with things outside of himself. Such a person would not have even the memories of previous sensations or experiences to arouse or heighten his consciousness or thought, and consequently he would have no imagination to use. He would be, to all intents and purposes, a living corpse. Helen Keller has only two doors of sensation closed to her--the sense of sight and the sense of hearing. Touch, taste, and smell, however were left to her; and each was quickened and heightened in order to help so far as possible to perform the world of the defective senses. The reaching of the consciousness of this girl is considered by science to be akin to a miracle--yet only two senses were missing. To appreciate the full meaning of the importance of the senses, one has but to think of Helen Keller as having been also deprived of the sense of touch." The Elemental Sense. Science informs us that all of the five senses of man, viz., the respective senses of touch, sight, hearing, taste, and smell are but modifications of one elementary sense namely the sense of touch; and that the other senses have been gradually evolved from that one elementary sense. This is seen to be the case when it is realized that the only way that we "sense" the presence of an outside object--be that object either a material substance, a vibration of the air, or an etheric vibration of light--is by that outside object coming in contact, directly or indirectly, with one or more of our sensory nerves, the latter conveying the report of the contact to the brain, which translates the sensation into what is called a "perception." This is true of the sensations of touch, sight, hearing, taste, and smell, and of senses higher than these and which as yet are not recognized by science. Consequently, the consciousness of the presence of an outside thing arises from contact with that outside thing through the channel of the sense of touch, or of some of its more complex evolved phases. The Raw Material of Thought.