No hymns may be sung in the Mother Church unless they have been approved by Mrs. Eddy, and Mrs. Eddy's own hymns must be sung at stated intervals. "If a solo singer in the Mother Church shall either neglect or refuse to sing alone a hymn written by our Leader and Pastor Emeritus, as often as once each month, and oftener if the Directors so direct, a meeting shall be called and the salary of this singer shall be stopped." _Supreme Authority_ But far above all these lesser by-laws Mrs. Eddy holds one in which her supreme authority rests. A mesmerist or "mental malpractitioner" is, of course, to be excommunicated, and "if the author of Science and Health shall bear witness to the offense of mental malpractice, it shall be considered sufficient evidence thereof."[24] The accused can make no defense, has no appeal. If any Christian Scientist offends Mrs. Eddy, if he writes a letter to the _Journal_ and uses a phrase which does not please her, if he is too popular in his own community, if it is rumored that he reads upon philosophy or metaphysics, or medicine, if he in any way wounds her vanity, Mrs. Eddy can expel him from the church by a word, without explanation, and he can make no effort to vindicate himself. In the matter of hypnotism Mrs. Eddy's mere word is enough. She has, she says, an unerring instinct by which she can detect hypnotism in any creature: "I possess a spiritual sense of what the malicious mental practitioner is mentally arguing which cannot be deceived; I can discern in the human mind thoughts, motives, and purposes; and neither mental arguments nor psychic power can affect this spiritual insight."[25] _Actual Size of Mrs. Eddy's Following_ The result of Mrs. Eddy's planning and training and pruning is that she has built up the largest and most powerful organization ever founded by any woman in America. Probably no other woman so handicapped--so limited in intellect, so uncertain in conduct, so tortured by hatred and hampered by petty animosities--has ever risen from a state of helplessness and dependence to a position of such power and authority. All that Christian Science comprises to-day--the Mother Church, branch churches, healers, teachers, Readers, boards, committees, societies--are as completely under Mrs. Eddy's control as if she were their temporal as well as their spiritual ruler. The growth of her power has been extensive as well as intensive. In June, 1907, the membership of the Mother Church, according to the Secretary's report, was 43,876. The membership of the branch churches amounted to 42,846. As members of the branch churches are almost invariably members of the Mother Church as well, there cannot be more than 60,000 Christian Scientists in the world to-day, and the number is probably nearer 50,000.