Cohesion.
207. Lowest in the scale come inanimate objects, such as stones[102]. Yet even these have a property which corresponds to soul, and which keeps them together in a particular outward form or shape; this property we call ‘cohesion’ (ἕξις, unitas)[103]; like soul itself, it is a spirit pervading the whole[104], and again it is the Logos of the whole. An external force cannot impart this unity: so that the water contained in a glass is not an ‘inanimate object’ in this sense[105]. In this lowest grade of ‘spirit’ we read in Stoicism the antithesis of the materialism of Epicurus, who postulates for his ‘atoms’ the fundamental property of indivisibility, and can only account for the coherence of the bodies formed from them by supplying them with an elaborate system of ‘hooks and eyes,’ which was a frequent subject of derision to his critics. Epicurus makes the indivisibility of the smallest thing his starting-point, and from it constructs by degrees a compacted universe by arithmetical combination; the Stoics start from the indivisibility of the great whole, and working downwards explain its parts by a gradual shedding of primitive force. God is in fact in the stone by virtue of his power of universal penetration (κρᾶσις δι’ ὅλων)[106].
Gradations of spirit.
208. No existing thing can possess one of the higher grades of spirit without also possessing all the lower. Stones therefore have cohesion, plants growth and cohesion, animals soul growth and cohesion; for these are not different qualities which can be combined by addition, but appearances of the same fundamental quality in varying intensity. Man clearly possesses cohesion, for he has an outward shape; there does not however seem to be any part of him which has merely cohesion. But in the bones, the nails, and the hair are found growth and cohesion only, and these parts grow as the plants do. In the eyes, ears and nose, are sensation, as well as growth and cohesion; that is, there is soul in the sense in which the animals possess soul. It is the intelligence only which in man possesses soul in the highest grade[107].
The conflagration.
209. This universe, in spite of its majesty, beauty and adaptation, in spite of its apparent equipoise and its essential divinity, is destined to perish. ‘Where the parts are perishable, so is the whole; but the parts of the universe are perishable, for they change one into another; therefore the universe is perishable[108].’ Possibly this syllogism would not have appeared so cogent to the Stoics, had they not long before adopted from Heraclitus the impressive belief in the final conflagration, familiar to us from its description in the ‘second epistle of Peter[109].’ According to this theory, the interchange of the elements already described[110] is not evenly balanced, but the upward movement is slightly in excess. In the course of long ages, therefore, all the water will have been converted into air and fire, and the universe will become hot with flame[111]. Then the earth and all upon it will become exhausted for want of moisture, and the heavenly bodies themselves will lose their vitality for want of the exhalations on which they feed. Rivers will cease to flow, the earth will quake, great cities will be swallowed up, star will collide with star. All living things will die, and even the souls of the blest and the gods themselves will once more be absorbed in the fire, which will thus regain its primitive and essential unity[112]. Yet we may not say that the universe dies, for it does not suffer the separation of soul from body[113].
Is the universe perishable?
210. In connexion with the doctrine of the conflagration the Stoics were called upon to take sides upon the favourite philosophic problem whether the universe is perishable, as Democritus and Epicurus hold, or imperishable, as the Peripatetics say[114]. In replying to this question, as in the theory as a whole, they relied on the authority of Heraclitus[115]. The word universe is used in two senses: there is an eternal universe (namely that already described as the universal substance made individual by the possession of quality[116]), which persists throughout an unending series of creations and conflagrations[117]. In another sense the universe, considered in relation to its present ordering, is perishable[118]. Just in the same way the word ‘city’ is used in two senses; and that which is a community of citizens may endure, even though the collection of temples and houses also called the ‘city’ is destroyed by fire[119].
Dissentient Stoics.