Since matter conditions us who were born to be unconditioned and since matter is apparently the root of so many ills, the seat of so many pains, matter goes with the rest. Mrs. Eddy is not always consistent in her consideration of matter; sometimes she confines herself to saying that there is neither sensation nor life in matter--which may be true enough save as matter both affords the material for sensation and conditions its forms, which is an immense qualification,--but again and again she calls matter an illusion. Consistently the laws of physics and chemistry should disappear with the laws of hygiene and medicine, but Mrs. Eddy does not go so far as that though it would be difficult to find a logical stopping place once you have taken this line. Mortal mind is apparently the source of all these illusions. Mrs. Eddy's disposal of matter, along with her constant return to its misleading mastery in experience is an outstanding aspect of her book. The writer is inclined to believe that Mrs. Eddy's formula: "There is ... no matter in life and no life in matter," is an echo of Tyndall's famous utterance--made about the time she was working with her system--that he found "in matter the promise and potency of all life." There is surprisingly little reference in "Science and Health" to philosophic or scientific sources. Cutter's physiology is quoted in some editions--an old textbook which the writer remembers to have found among his mother's school books. There are a few references to popular astronomy, but in general for Mrs. Eddy modern science does not exist except in the most general way as the erroneous expression of error and always with a small "s" as against the capital "S" of her own system. Nor does she show any knowledge of other philosophic idealisms nor any acquaintance with any solution of the problems she was facing save the commonplaces of evangelical orthodoxy. "Science and Health" knows nothing also of any medical science save the empirical methods of the medical science of 1860 and 1870.