One of the most marked instances of the action and reaction of Mental States and Physical Conditions is met with in the activities of the sexual organism. Psychologists very properly hold that sexual excesses and abnormalities are largely due to improper thinking, that is, by allowing the attention and interest to dwell too strongly and continuously upon subjects connected with the activities of that part of the physical system. Mental treatment along the lines of Suggestive Therapeutics has resulted in curing many persons of troubles of this sort. But, note the correlated fact--excess and abnormalities of the kind mentioned, almost invariably react upon the mentality of the person indulging in them, and softening of the brain, paralysis, or imbecility have often arisen directly from these physical abuses. It will be seen that any sane treatment of these troubles must take into consideration both Body and Mind. In the same way it is a fact that just as certain Mental States, notably those of fear, worry, grief, jealousy, etc., will injuriously affect the organs of digestion and assimilation, so will imperfect functioning of these organs tend to produce depressing mental states similar to those just mentioned. Many instances of the strange correspondences are met with in the study of physiological-psychology, or psychological-physiology. In order to more fully appreciate the relation between the Body and the Mind, let us read the following lines from Prof. Halleck: "Marvelous as are the mind's achievements, we must note that it is as completely dependent upon the nervous system as is a plant upon sun, rain and air. Suppose a child of intelligent parents were ushered into the world without a nerve leading from his otherwise perfect brain to any portion of his body, with no optic nerve to transmit the glorious sensations from the eye, no auditory nerve to conduct the vibrations of the mother's voice, no tactile nerves to convey the touch of a hand, no olfactory nerve to rouse the brain with the delicate aroma from the orchards and the wild flowers in spring, no gustatory, thermal or muscular nerves. Could such a child live, as the years rolled on, the books of Shakespeare and of Milton would be opened in vain before the child's eyes. The wisest men might talk to him with utmost eloquence, all to no purpose. Nature could not whisper one of her inspiring truths into his deaf ear, could not light up that dark mind with a picture of the rainbow or of a human face. No matter how perfect might be the child's brain and his inherited capacity for mental activities, his faculties would remain for this life shrouded in Egyptian darkness. Perception could give memory nothing to retain, and thought could not weave her matchless fabrics without materials."