Manual of the Mother Church-The First Church of Christ Scientist in Boston, Massachusetts is a classic Christian Science text by Mary Baker Eddy. The Rules and By-laws in the Manual of The First Church of Christ, Scientist, Boston, originated not in solemn conclave as in ancient Sanhedrim. They were not arbitrary opinions nor dictatorial demands, such as one person might impose on another. They were impelled by a power not one's own, were written at different dates, and as the occasion required. They sprang from necessity, the logic of events, --from the immediate demand for them as a help that must be supplied to maintain the dignity and defense of our Cause; hence their simple, scientific basis, and detail so requisite to demonstrate genuine Christian Science, and which will do for the race what absolute doctrines destined for future generations might not accomplish.