Mechanism, the first form of objectivity, is also the category which primarily offers itself to reflection, as it examines the objective world. It is also the category beyond which reflection seldom goes. It is, however, a shallow and superficial mode of observation, one that cannot carry us through in connexion with Nature and still less in connexion with the world of Mind. In Nature it is only the veriest abstract relations of matter in its inert masses which obey the law of mechanism. On the contrary the phenomena and operations of the province to which the term 'physical' in its narrower sense is applied, such as the phenomena of light, heat, magnetism, and electricity, cannot be explained by any mere mechanical processes, such as pressure, impact, displacement of parts, and the like. Still less satisfactory is it to transfer these categories and apply them in the field of organic nature; at least if it be our aim to understand the specific features of that field, such as the growth and nourishment of plants, or, it may be, even animal sensation. It is at any rate a very deep-seated, and perhaps the main, defect of modern researches into nature, that, even where other and higher categories than those of mere mechanism are in operation, they still stick obstinately to the mechanical laws; although they thus conflict with the testimony of unbiassed perception, and foreclose the gate to an-adequate knowledge of nature. But even in considering the formations in the world of Mind, the mechanical theory has been repeatedly invested with an authority which it has no right to. Take as an instance the remark that man consists of soul and body. In this language, the two things stand each self-subsistent, and associated only from without. Similarly we find the soul regarded as a mere group of forces and faculties, subsisting independently side by side.