(5) Those enjoyments born of external contacts are themselves indeed the source of pain only; they have a beginning and end; the wise do not rejoice in them.

(11) Careful scientific tests have determined that there is what is known as "the fatigue of elasticity" in metals, which is relieved by a rest or "vacation." This has also been found true of razors, the edges of which are restored by a little rest, thus corroborating the ancient "superstition" of users of razors. Tuning forks have been found to lose their power of vibration by over-use, a short rest restoring the same. Machinery in mills and factories have been found to be benefited by an occasional "day off." Metals have been discovered to be subject to disease and infection, and in some cases have been found to have been actually poisoned and afterward restored by antidotes. Window glass, especially the fine stained glass of cathedral windows, is found to be subject to an infectious disease, spreading from pane to pane, and resulting in the disintegration of the substance of the glass. Workmen's tools have been found to experience fatigue, and to be the better for an occasional holiday or longer vacation. Every observing machinist has observed certain idiosyncrasies in particular machines which need "humoring." The most conclusive scientific report upon this interesting subject, so far as known to the present writer, is that which recites the celebrated series of experiments conducted upon so-called "non-living matter, several years ago, and which are recorded in the book entitled "Response in the Living and Non-Living," by the scientists who conducted the experiments, Professor J. Chunder Bose, of the Calcutta University, who occupies a high position in the scientific world. Professor Bose's experiments have aroused the greatest interest in prominent scientific circles, and have aided greatly in corroborating the conclusions of other scientists who hold that "there is no such thing as dead matter." Proceeding from the fundamental postulate that the best and only true test of the presence of life is the response of matter to external stimulus, Professor Bose has demonstrated that in many instances so-called inorganic matter, such as metals, minerals, etc., give a response to such stimulus which is similar, if not indeed identical, to the response of the matter composing the bodies of "living" animals, plants, and men. He devised certain very delicate apparatus for registering and measuring such responses, the same being traced as curves on a revolving cylinder. He employed that most delicate scientific instrument called, the Galvanometer in these experiments. The Galvanometer will register the faintest irritation of nerve-matter, or living muscle; and the experiments proved that it would also register the variations of minerals, metals, etc., subjected to the stimulus of outside force; the curves or tracings being practically identical in either case.

(2) Contact of the senses with the objects produces heat and cold, pain and pleasure. These experiences come and go, and are impermanent. Endure them, O Arjuna!