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are to remember, that these bear by no means the same proportion to each other in different individuals. Not only are specific, intellectual endowments and feelings diverse in power, the three classes of activities present various degrees of development. In one, intellectual effort absorbs the mind; in another, the emotions are the chief seats of action; while a third is possessed of a will that lapses into stubbornness, through the inefficiency of the thoughts in its guidance. Moreover, different temperaments cause essentially the same faculties to exhibit very different degrees of force. The nutritive and the nervous systems are most intimately associated with the mind. Great impressibility and power in the nervous organization; a preponderance of the nutritive functions giving a full animal life; nervous power well-balanced and well-sustained by the nutritive system, constitute the nervous, phlegmatic and sanguine temperaments, which greatly modify the measure, hopefulness, and satisfaction of intellectual efforts, even when the natural endowments of mind are nearly the same. As the body is at once the medium by which impressions reach the mind, the source whence the strength for their consideration is secured, and the instrument by which its practical and theoretical conclusions concerning them are expressed, the importance of the physical conditions of mental activity cannot easily be over-stated, nor be too carefully inquired into. These researches, however, pertain chiefly to physiology. It is our task to trace the strictly mental interplay of the faculties, a dependence, not primarily the result of physical connections.

Lesson 109 - 2. Order of activities -- Reflex relation - p.426

2. Thought, feeling and volition, express the order in which action ordinarily occurs, the line along which any influence brought to bear on the mind passes through its faculties.

Yet these three steps, though usual, are not all necessary.