To the natural philosophy of Epicurus there also belongs his conception of the soul, which he looks on as having the nature of a thing, just as the theories of our own day regard it as nerve-filaments, cords in tension, or rows of minute balls (p. 294). His description of the soul has therefore but little meaning, since here also he draws his conclusion by analogy, and connects therewith the metaphysical theory of atoms: “The soul consists of the finest and roundest atoms, which are something quite different from fire, being a fine spirit which is distributed through the whole aggregate of the body, and partakes of its warmth.” Epicurus has consequently established a quantitative difference only, since these finest atoms are surrounded by a mass of coarser atoms and dispersed through this larger aggregate. “The part which is devoid of reason is dispersed in the body” as the principle of life, “but the self-conscious part (τὸ λογικόν) is in the breast, as may be perceived from joy and sadness. The soul is capable of much change in itself, owing to the fineness of its parts, which can move very rapidly: it sympathizes with the rest of the aggregate, as we see by the thoughts, emotions and so on; but when it is taken away from us we die. But the soul, on its part, has also the greatest sympathy with sensuous perception; yet it would have nothing in common with it, were it not in a certain measure covered by the rest of the aggregate” (the body)—an utterly illogical conception. “The rest of this aggregate, which this principle provides for the soul, is thereby also partaker, on its part, of a like condition” (sensuous perception), “yet not of all that the former possesses; therefore, when the soul escapes, sensuous perception exists no more for it. The aggregate spoken of above has not this power in itself, but derives it from the other which is brought into union with it, and the sentient movement comes to pass through the flow of sympathy which they have in common.”[161] Of such conceptions it is impossible to make anything. The above-mentioned (p. 287) interruption of the streaming together of images of external things with our organs, as the ground of error, is now explained by the theory that the soul consists of peculiar atoms, and the atoms are separated from one another by vacuum. With such empty words and meaningless conceptions we shall no longer detain ourselves; we can have no respect for the philosophic thoughts of Epicurus, or rather he has no thoughts for us to respect.