[22] “The practice of treating the unanalysed _I_-complex as an indivisible unity frequently finds scientific expression in singular fashion. First of all, the nervous system is set apart from the body as being the seat of sensation. In the nervous system, again, the brain is picked out as likeliest to be such a seat. And, finally, in order to save the supposed psychic unity, search is made in the brain for a _point_ as the seat of the soul. Views so crude as these, however, are but ill adapted to indicate beforehand even in roughest outline the path of future investigation as to the connection between the physical and the psychical.” Comparison should also be made with the introductory remarks to the chapter on “Der Sitz des Bewusstseins” in Bunge’s _Physiologie_. [23] _Majjhima Nikāya_, Sutta 28. [24] Cf. Essay VII. [25] Cf. Essay V., the citation from the _Majjhima Nikāya_, Sutta 38. [26] _Origin of Species_, p. 212. John Murray, London, 1884. [27] _Physiologie_, i. p. 402. [28] _Origin of Species_, p. 259. John Murray, London, 1884. [29] _Ibid._ p. 297. [30] _Origin of Species_, p. 308. [31] Bunge’s _Physiologie_. [32] Weismann’s _Leben und Tod_. [33] G. v. Bunge, _Physiologie_, i. p. 361. [34] Cf. Essay IX. [35] Cf. Essay V., remarks on the causal sequence. [36] It is to this effect that E. Mach expresses himself on the subject of the concept in various passages in his works--for example, in the _Wärmelehre_ and _Erkenntnis und Irrtum_. Ostwald defines the concept “as a rule in accordance with which we take note of definite characteristics of the phenomenon” (_Naturphilosophie_). [37] For a correct appreciation of the law of the conservation of energy and the value of scientific laws and data in general, one should read among others Poincaré’s two works: _The Value of Science_, and _Science and Hypothesis_. [38] Cf. Foreword to E. Mach’s _Analyse der Sinnesempfindungen_. [39] E. Mach’s _Analyse der Sinnesempfindungen_, p. 4. [40] _Analyse der Empfindungen_, page 15. [41] _Analyse der Empfindungen_, p. 20. [42] _Ibid._ [43] Positivism itself calls attention to this quality of non-actuality in its system. In the Foreword to the second volume of R. Avenarius’s _Kritik der reinen Erfahrung_, J. Petzold says, “Modern psychology is ... characterized by the elimination from the psychic machinery of every spring of activity.” Here it is as with Roland’s mare in Chamisso’s poem: Perfect--but dead! [ Transcriber’s notes ] Non-English words are rendered as in the original, and may not be consistent or correct. Exceptions: 1) “tanhā” and “taḥha” have been rendered as the text’s preferred “taṇhā”; 2) “Sankhāra” was printed numerous ways and has been standardized as quoted. The “{sic}” in the text is the transcriber’s. The quote beginning “Ignorance must be present” (p. 77) is not closed in the original; the transcriber closed it at the end of the paragraph.