Says one: "We have only to believe ourselves to be well, and we shall be well." Says another: "My belief had nothing to do with disease, I had the disease before I knew it." My friends, you both are mistaken; neither statement is correct, and metaphysics would destroy both those beliefs before healing you.
The author of "Science and Health" never said to a patient, and never taught a student, that to believe yourself well heals you. Your diseases are your beliefs, and you cannot in science, if you can through vaccination, cure one disease by producing another, neither can you destroy one belief by another belief. You will find in my text-book of mental healing, entitled, "Science and Health," the following: "Belief taken at its best is not promotive of health; unless every ill and error is conquered by Truth they are never destroyed." Not his patient's belief, or faith, but the doctor's understanding of Truth masters sickness in mental science.