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Translated by W. Moore and H. A. Wilson
70 Pages
Page 64
8. Now as a soft and yielding substance, if it had no assistance from the hard parts, would certainly have, like molluscs, neither motion nor articulation, nature accordingly mingles in the body the hardness of the bones, and uniting these by close connection one to another, and knitting their joints together by means of the sinews, thus plants around them the flesh which receives sensations, furnished with a somewhat harder and more highly-strung surface than it would otherwise have had.
9. While resting, then, the whole weight of the body on this substance of the bones, as on some columns that carry a mass of building, she did not implant the bone undivided through the whole structure: for in that case man would have remained without motion or activity, if he had been so constructed, just like a tree that stands on one spot without either the alternate motion of legs to advance its motion or the service of hands to minister to the conveniences of life: but now we see that she contrived that the instrument should be rendered capable of walking and working by this device, after she had implanted in the body, by the determining spirit which extends through the nerves, the impulse and power for motion. And hence is produced the service of the hands, so varied and multiform, and answering to every thought. Hence are produced, as though by some mechanical contrivance, the turnings of the neck, and the bending and raising of the head, and the action of the chin, and the separation of the eyelids, that takes place with a thought, and the movements of the other joints, by the tightening or relaxation of certain nerves. And the power that extends through these exhibits a sort of independent impulse, working with the spirit of its will by a sort of natural management, in each particular part; but the root of all, and the principle of the motions of the nerves, is found in the nervous tissue that surrounds the brain.
10. We consider, then, that we need not spend more time in inquiring in which of the vital members such a thing resides, when the energy of motion is shown to be here. But that the brain contributes to life in a special degree is shown clearly by the result of the opposite conditions: for if the tissue surrounding it receives any wound or lesion, death immediately follows the injury, nature being unable to endure the hurt even for a moment; just as, when a foundation is withdrawn, the whole building collapses with the part; and that member, from an injury to which the destruction of the whole living being clearly follows, may properly be acknowledged to contain the cause of life.
11. But as furthermore in those who have ceased to live, when the heat that is implanted in our nature is quenched, that which has become dead grows cold, we hence recognize the vital cause also in heat: for we must of necessity acknowledge that the living being subsists by the presence of that, which failing, the condition of death supervenes. And of such a force we understand the heart to be as it were the fountain-head and principle, as from it pipe-like passages, growing one from another in many ramifications, diffuse in the whole body the warm and fiery spirit.
Reference address : https://www.elpenor.org/nyssa/making-man.asp?pg=64