When Mary Baker Eddy, the Discoverer and Founder of Christian Science, discerned the distinction between reality and unreality, she initiated a spiritual revolution in human consciousness. Lying in bed with an injury which neither medicine nor surgery could heal, she read the Bible and gained a spiritual conviction that God, divine Mind, is the cause of all real being and that all that is not of Mind is unreal. This consciousness of reality healed her.
Mrs. Eddy then undertook a searching study of the Bible to determine what it was that brought about her sudden recovery. She apprehended that the works of Jesus were based upon a divine Principle, that he was demonstrating a spiritual Science which naturally healed the sick and the sinning. Several years later, after she had tested what she found in the Bible, Mrs. Eddy wrote the textbook of Christian Science, "Science and Health with Key to the Scriptures," and she established the Church of Christ, Scientist, in order to present her discovery to the world.
In her study of the Bible, Mrs. Eddy found that Jesus had assured his followers that after his departure God would give them another Comforter. This Comforter he described also as the "Spirit of truth" and the Holy Ghost. It was this Comforter, or Science of Christianity, that Jesus used which had healed our Leader. Her discovery was a revelation of that which was already existent, although hidden from human sight. Mrs. Eddy was spiritually equipped to discern the Science of Christianity and to present it to mankind. "This Comforter," she says on page 55 of Science and Health, "I understand to be Divine Science."
