A History of Greek Philosophy / THE ATOMISTS / LEUCIPPUS AND DEMOCRITUS

Page 5

Sensation and perception were forms in which these external forces acted upon the more nimble and lively existences, more particularly on living creatures. For every body was continually sending forth emanations or images resembling itself sufficiently in form and structure to affect perceptive bodies with an apprehension of that form and structure. These images travelled by a process of successive transmission, similar to that by which wave-motions are propagated in water. They were, in other words, not movements of the particles of the objects, which latter must otherwise in time grow less and fade away, but a modification in the arrangement of the particles immediately next the object, which modification reproduced itself in the next following, and so on right through the medium to the perceptive body.

These images tended by extension in all directions to reach vast dimensions at times, and to influence the minds of men in sleep and on other occasions in strange ways. Hence men imagined gods, and attributed those mighty phenomena of nature—earthquakes, tempests, lightning and thunder, and dire eclipses of sun and moon, to the vaguely visible powers which they imagined they saw. There was indeed a soul or spirit of the universe, as there was a soul or spirit of every individual thing that constituted it. But this was only a finer system of atoms after all. All else is convention or dream; the only realities are Atoms and Emptiness, Matter and Space.

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