Mary Baker Eddy says in "Science and Health with Key to the Scriptures" (p. 504), "The rays of infinite Truth, when gathered into the focus of ideas, bring light instantaneously, whereas a thousand years of human doctrines, hypotheses, and vague conjectures emit no such effulgence." When we understand that God is omnipotent and omnipresent Being and man is His perfect image and likeness, and demonstrate these truths, we focus the rays of infinite Life, Truth, and Love. Such realization excludes the darkness of false belief that evil has power or that disease has intelligence. This brings healing.
Jesus understood man to be the image of all that God is; therefore he was able to focus "the rays of infinite Truth" upon mortals, and thus bring about healing. In Science and Health Mrs. Eddy states (p. 475): "Man is spiritual and perfect; and because he is spiritual and perfect, he must be so understood in Christian Science. Man is idea, the image, of Love; he is not physique." Then she continues, "He is the compound idea of God, including all right ideas." A dictionary defines the word compound in part as "composed of, or produced by the union of, several elements, ingredients, parts, or things."
The Bible narrative of the healing of the centurion's servant by the Master is a good explanation of how Jesus brought to a focus upon mortals the rays of Truth, which illumined their thoughts and brought them a higher sense of God and His reflection, man. The centurion was confident that the Master could heal his servant through the power of God. He sent word to Jesus (Luke 7:6, 7), "Lord, trouble not thyself: for I am not worthy that thou shouldest enter under my roof: wherefore neither thought I myself worthy to come unto thee: but say in a word, and my servant shall be healed." We read that Jesus "marvelled at him, and turned him about, and said unto the people that followed him, I say unto you, I have not found so great faith, no, not in Israel." Jesus commended the centurion's faith in his ability to focus the rays of infinite Love —to "say in a word"—and to reflect the truth. And the centurion's servant was healed.
