=Life is a unit.=--It takes only a few days for the procreative cells to be elaborated and matured. Here is a child. The initial of its life occurred twenty years after its parents had their right arms amputated. How could the procreative cells that formed the initial of that child’s life have in them a material representation from the right arms of those parents that had been amputated twenty years before the birth of the child? Suppose that the parents had undergone a much larger mutilation of the body, leaving them only the organs necessary to continued life and propagation, would the child have inherited the absent parts? Yes. Why? For the reason that sex is in the life of the individual, and not simply in the material substance of the body. A human body may have had some of the members removed but the physical life remains a unit. The embryo formed by the union of a masculine and a feminine cell will have a unit of physical life. During the nine months of gestation this unit of embryonic physical life will be incarnated in a unit of physical organism. Should a lobe of the brain of each parent, through which some mental or moral attribute functions, be removed, the child would inherit a unit of brain organism, for the reason that it inherited from the parents a unit of mental and moral life. =Sex a resident part of life.=--These illustrations show that sex is vitally related to the physical, mental and moral life; that the physical nature of the child is the product of the union of the masculine and feminine principles of the physical life of the parents represented in the procreative cells; that the mental nature of the child is the product of the union of the masculine and feminine principles of the mental life of the parents represented in the procreative cells; that the spiritual nature of the child is the product of the union of the masculine and feminine principles of the spiritual life of the parents represented in the procreative cells. The three-fold life of a child is the product of the blending of the three-fold life of its parents. =Heredity explained.=--The Bible tells us that “the blood is the life.” Science cannot express this truth better. The three-fold expressions of life are not in the blood. The blood furnishes life for every cell. Physical, mental and moral states are influenced by the conditions of the blood. These three natures meet and influence each other in the blood. Jesus appealed to the will of the patient. “Wilt thou be made whole?” “Arise, take up thy bed and walk.” “Stretch forth thy hand.” Jesus recognized the influence of the mind, expressed in will, as well as the spiritual expressed in faith, as a means of physical restoration. Every successful doctor, whatever may be his medical views, recognizes the value of a strong purpose to recover.