Mrs. Eddy once said, “A true Science treatment does not consist of treating a disordered body or person, but does consist of destroying the error which is wholly mental. Two times two equaling five illustrates how unscientific it is to look at a blackboard and see that it says that two times two are five; then to realize that two times two are four; then to turn to the blackboard to see if it has changed on the board ere we believe the manifestation is complete.
“Never look at the body to see if the error has disappeared. If we do, and see the error as physical, or belonging to the individual, or see that man has a material body, then we do not trust scientifically. Now, you know that one and one are two, two and two are four, three times three are nine. You know that much of the truth of numbers, and it is all powerful, no matter how much error you know. As it is with numbers, so it is with Science. The little you do know is real and reflects God, no matter how much error you know that you have not worked out of yet; for as you know more and more of Truth, all error disappears from thought. No error can bind us beyond our belief in it.” Mary Baker Eddy (Carpenter, Jr., Gilbert, 500 Watching Points, #91)