In "The First Church of Christ, Scientist, and Miscellany" Mary Baker Eddy makes this important statement in connection with the scientific demonstration of truth (p. 242): "Christian Science is absolute; it is neither behind the point of perfection nor advancing towards it; it is at this point and must be practised therefrom. Unless you fully perceive that you are the child of God, hence perfect, you have no Principle to demonstrate and no rule for its demonstration." And she concludes the paragraph by saying, "In practising Christian Science you must state its Principle correctly, or you forfeit your ability to demonstrate it."
In the demonstration of Christian Science, the positive and correct statement of its propositions denies by implication all negative claims of the physical senses, thereby depriving these claims of any right to justification and so annulling them. By contrast, the assertion of any falsehood, even though supported by material sense testimony, cannot touch the truth which this falsehood would seem to reverse.
These scientific facts were proved to a student of Christian Science some years ago. She had, after much earnest and prayerful metaphysical work, experienced a remarkable healing of a severe intestinal disorder, caused by what seemed to be an obstructive growth. While this healing was going on, much fear, doubt, and criticism were expressed by the members of her family, who were very much devoted to her but who knew nothing of Christian Science. However, great joy and gratitude to God were expressed by all of them when the healing was completed, and two of them began the study of Christian Science. This was special reason to the student for rejoicing, because she had for a long time prayed earnestly that her family might become receptive to the truth.
