The transformation of the physical body into the image of the ideal held by the mind-body is not accomplished instantaneously; we cannot transfigure our physical bodies at will as Jesus did. In the creation and recreation of forms, Substance moves along the fixed lines of growth it has established; and the impression upon it of the health thought causes the healthy body to be built cell by cell. Holding only thoughts of perfect health will ultimately cause perfect functioning; and perfect functioning will in due time produce a perfectly healthy body. It may be as well to condense this chapter into a syllabus:-- _Your physical body is permeated and fitted with an Intelligent Substance, which forms a body of mind-stuff. This mind-stuff controls the functioning of your physical body. A thought of disease or of imperfect function, impressed upon the mind-stuff, causes disease or imperfect functioning in the physical body. If you are diseased, it is because wrong thoughts have made impressions on this mind-stuff; these may have been either your own thoughts or those of your parents; we begin life with many sub-conscious impressions, both right and wrong. But the natural tendency of all mind is toward health, and if no thoughts are held in the conscious mind save those of health, all internal functioning will come to be performed in a perfectly healthy manner._ _The Power of Nature within you is sufficient to overcome all hereditary impressions, and if you will learn to control your thoughts, so that you shall think only those of health, and if you will perform the voluntary functions of life in a perfectly healthy way, you can certainly be well._ CHAPTER V. FAITH. The Principle of Health is moved by Faith; nothing else can call it into action, and only faith can enable you to relate yourself to health, and sever your relation with disease, in your thoughts. You will continue to think of disease unless you have faith in health. If you do not have faith you will doubt; if you doubt, you will fear; and if you fear, you will relate yourself in mind to that which you fear. If you fear disease, you will think of yourself in connection with disease; and that will produce within yourself the form and motions of disease. Just as Original Substance creates from itself the forms of its thoughts, so your mind-body, which is original substance, takes the form and motion of whatever you think about. If you fear disease, dread disease, have doubts about your safety from disease, or if you even contemplate disease, you will connect yourself with it and create its forms and motions within you. Let me enlarge somewhat upon this point. The potency, or creative power, of a thought is given to it _by the faith that is in it_. Thoughts which contain no faith create no forms.