Let me give another illustration. Wishing to prove that the material world is an illusion of the senses, Mrs. Eddy tells us that on a wet day, when there is a downpour of rain, and when mist and fog shroud land and sea, we can easily assure ourselves that our senses are not telling us the truth, that the weather is really fine, by consulting a barometer, which in the midst of cloud and rain points to clear weather. What shall we think of the mentality of a woman who appeals to a barometer to prove that matter does not exist? If Mrs. Eddy had not suddenly stopped thinking, she would have seen that if our senses betray us when they report wet weather, neither would we have any assurance that what they say about the barometer is dependable. Does she think that our senses are not trustworthy except when they refer us to the barometer? Inconsistent thinking is often also responsible for inconsistency in conduct. The Christian Scientist, for example, objects to the physician, but patronizes the dentist. Yet dental surgery is not different from medicine, but is one of its many branches. It is by the science of medicine that the trouble in the body is located, diagnosed, and remedied by the knife, if it cannot be by medication. Besides, the wound or incision is treated medicinally, which requires medical knowledge on the part of the surgeon, just as it does on the part of the regular physician. Can a dentist practise surgery without a knowledge of the human anatomy--that is to say, of how many bones and muscles there are in the body, where the nerves are located, to what sort of treatment they will respond, and to what laws of growth and decay they are subject? Does he not treat an abscess or receding gums with medicine? And does this not require a knowledge of medicine which to Christian Scientists is nothing but "error"? Why do not these people invite a novice or their cooks or barbers to work on their teeth if a knowledge of anatomy, physiology, and medicine is not necessary to make a man a good dentist? The mere fact that Christian Scientists will not allow any one but a man with a diploma from a dental college to attend to their teeth proves conclusively that they regard a knowledge of medicine just as necessary as we do--only we admit it frankly, and they deny it foolishly. If the Christian Scientists have not progressed sufficiently to demonstrate against surgery, they should at least be grateful to us for taking care of their needs in the meantime, and help support the physical sciences until they are able to dispense with them. In her _Science and Health_ Mrs. Eddy ridicules those who think that vegetation or flowers can cause sickness, or that there can be such a thing as a "rose cold."