Science and Health with Key to the Scriptures‪ ‬

"Since the author's discovery of the might of Truth in the treatment of disease as well as of sin, her system has been fully tested and has not been found wanting; but to reach the heights of Christian Science, man must live in obedience to its divine Principle. To develop the full might of this Science, the discords of corporeal sense must yield to the harmony of spiritual sense, even as the science of music corrects false tones and gives sweet concord to sound."

"Science and Health with Key to the Scriptures" by Mary Baker Eddy is the key text of Christian Science and spiritual healing.