"Principle and its idea is one, and this one is God, omnipotent, omniscient, and omnipresent Being, and His reflection is man and the universe," writes Mary Baker Eddy in the textbook, "Science and Health with Key to the Scriptures" (pp. 465, 466). This oneness of divine Being including its reflection is a great spiritual fact for you and me to make practical by applying it in the minutiae of human affairs.
Then comes the question, How are we going to dispel that which appears contrary to the spiritual fact when confronted with inharmony of any kind? Material sense insistently declares that it is necessary to do something humanly to restore harmony. Christian Science, the Science of being, clearly shows the importance of realizing the facts of spiritual being rather than depending on human doing. Suppose, for example, that one is faced with a lack of needed supply. Material sense clamors that we must do something about it, perhaps get more money, and if this seems impossible, we may give way to despair. Christian Science shows that what is primarily needed to remove a sense of lack is not money but the filling of consciousness with positive, spiritual ideas of the abundance of good which dispel negative beliefs of lack.
Similarly, if one of the organs of the body seems to be disabled, diseased, or inactive, the need is not to do something to the organ, as materia medica would insist. The Science of being, understood, restores right action by illuminating consciousness with the true, spiritual sense of man and his God-constituted action. True action is produced by Mind. A spiritual idea does not have action which it may lose; but it reflects the harmonious, perpetual activity of the divine Mind, forever independent of matter, material conditions, time, place, or physicality. The realization of the perfection and completeness of God and man is what is needed. The Christ-idea, when accepted in human consciousness, destroys the false belief that action and function are separate from God, Spirit, and dependent on matter.