From "Currents and Counter Currents."
=214.= MECHANISM OF VITAL ACTION.
But if the student of nature and the student of divinity can once agree that all the forces of the universe, as well as all its power, are immediately dependent upon its Creator,—that He is not only omni_potent_ but omni_movent_,—we have no longer any fear of nebular theories, or doctrines of equivocal generation, or of progressive development….
We begin then by examining the general rules which the Creator seems to have prescribed to His own operations. We ask, in the first place, whether He is wont, so far as we know, to employ a great multitude of materials, patterns, and forces, or whether He has seen fit to accomplish many different ends by the employment of a few of these only.
In all our studies of external nature, the tendency of increasing knowledge has uniformly been to show that the rules of creation are simplicity of material, economy of inventive effort, and thrift in the expenditure of force. All the endless forms in which matter presents itself to us, are resolved by chemistry into some three-score supposed simple substances, some of these perhaps being only modifications of the same element. The shapes of beasts and birds, of reptiles and fishes, vary in every conceivable degree; yet a single vertebra is the pattern and representation of the framework of them all, from eels to elephants. The identity reaches still further,—across a mighty gulf of being,—but bridges it over with a line of logic as straight as a sunbeam, and as indestructible as the scymitar-edge that spanned the chasm, in the fable of the Indian Hades. Strange as it may sound, the tail which the serpent trails after him in the dust, and the head of Plato, were struck in the die of the same primitive conception, and differ only in their special adaptation to particular ends. Again, the study of the movements of the universe has led us, from their complex phenomena, to the few simple forces from which they flow. The falling apple and the rolling planet are shown to obey the same tendency. The stick of sealing-wax which draws a feather to it, is animated by the same impulse that convulses the stormy heavens. These generalizations have simplified our view of the grandest material operations, yet we do not feel that creative power and wisdom have been shorn of any single ray, by the demonstrations of Newton, or of Franklin. On the contrary, the larger the collection of seemingly heterogeneous facts we can bring under the rule of a single formula, the nearer we feel that we have reached towards the source of knowledge, and the more perfectly we trace the little arc of the immeasurable circle which comes within the range of our hasty observations, at first like the broken fragments of a many-sided polygon, but at last as a simple curve which encloses all we know, or can know, of nature. To our own intellectual wealth, the gain is like that of the over-burdened traveller, who should exchange hundred-weights of iron for ounces of gold. Evanescent, formless, unstable, impalpable, a fog of uncondensed experiences hovers over our consciousness like an atmosphere of uncombined gases. One spark of genius shoots through it, and its elements rush together and glitter before us in a single translucent drop. It would hardly be extravagant to call Science the art of packing knowledge.
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=John William Draper,[52] 1810-.=
From the "Human Physiology."
=215.= TRUTHS IN THE ANCIENT PHILOSOPHIES.
It is not my intention to enter on an examination, or even enumeration, of ancient philosophical opinions, nor to show that many of the doctrines which have been brought forward within the last three centuries existed in embryo in those times. It may, however, be observed that, in the midst of much error, there were those who held just views of the various problems of theology, law, politics, philosophy, and particularly of the fundamental doctrines of natural science, the constitution of the solar system, the geological history of the earth, the nature of chemical forces, the physiological relations of animals and plants.