The most baffling unsanitary and unhygienic conditions are the internal, and yet if these conditions are considered in the light of the same common sense as is applied to the external conditions, no great amount of difficulty will be experienced in coping with them. However, great difficulties will be experienced if an effort is made to keep the internal in a proper sanitary condition by the application of external means. This has been well demonstrated in the application of medical hygiene. However, the author does not want to be understood as implying that a great deal of good has not been accomplished in the investigations that have been made along the line of hygiene and more especially in sanitary science. But when chiropractic philosophy is properly understood, it will be readily seen that it is far better to clean the inside from the inside than to attempt cleaning the inside from the outside. With all due regard it must be said that up to the time of the introduction of chiropractic hygiene all the efforts were to clean the inside from the outside, but Chiropractic says the inside must be cleansed from the inside and this contention has been amply proven in the results obtained through chiropractic adjustments. Advantages of a Proper Sanitary Environment The body is capable of great possibilities in intellectual adaptation. It is possible for Innate Intelligence to maintain a degree of health in widely different conditions. Even where the environment is extremely adverse and objectionable Innate will adapt herself to the abnormal condition and maintain the normal processes of life in the body. However, it must be remembered that a greater amount of internal force is required to bring about an intellectual adaptation to an adverse environment than to a normal, natural or more perfect environment. There must be a constant process of adaptation to the environment even though that environment be a most desirable one. All internal processes must of necessity be adaptative to external conditions. Drummond says, “Life is uninterrupted correspondence with proper environment.” This is true of the expression of life. If the correspondence with the environment is interfered with there will be a corresponding interference with the expression of the life in the body. The more adverse the environment the greater the amount of force required to bring about this adaptation. Likewise, the reverse is true—adaptation to a more desirable environment requires less internal force. We should not compel Innate Intelligence to do things that we could do educationally and save the body that extra amount of internal force. To illustrate, one should not unnecessarily expose his body to the cold and thus force Innate to expend internal energy to adapt the body to that condition. One might better put on proper clothing to protect the body. On the other hand, one should not go to the other extreme and make a hothouse plant of his body.