CHAPTER V EMPEDOKLES OF AKRAGAS · 7

Empedokles held that the Air when separated off from the original mixture of the elements was spread round in a circle. After the Air, Fire running outwards, and not finding any other place, ran up under the solid that surrounded the Air.[603] There were two hemispheres revolving round the earth, the one altogether composed of fire, the other of a mixture of air and a little fire. The latter he supposed to be the Night. The origin of their motion he derived from the fact of fire preponderating in one hemisphere owing to its accumulation there. Ps.-Plut. Strom. fr. 10 (Dox. p. 582; R. P. 170 a).

The first of the elements to be separated out by Strife, then, was Air, which took the outermost position surrounding the world (cf. fr. 38). We must not, however, take the statement that it surrounded the world “in a circle” too strictly. It appears that Empedokles regarded the heavens as shaped like an egg.[604] Here, probably, we have a trace of Orphic ideas. At any rate, the outer circle of the Air became solidified or frozen, and we thus get a crystalline vault as the boundary of the world. We note that it was Fire which solidified the Air and turned it to ice. Fire in general had a solidifying power.[605]

In its upward rush Fire displaced a portion of the Air in the upper half of the concave sphere formed by the frozen sky. This air then sunk downwards, carrying with it a small portion of the fire. In this 274way, two hemispheres were produced: one, consisting entirely of fire, the diurnal hemisphere; the other, the nocturnal, consisting of air with a little fire.

The accumulation of Fire in the upper hemisphere disturbs the equilibrium of the heavens and causes them to revolve; and this revolution not only produces the alternation of day and night, but by its rapidity keeps the heavens and the earth in their places. This was illustrated, Aristotle tells us, by the simile of a cup of water whirled round at the end of a string.[606] The verses which contained this remarkable account of so-called “centrifugal force” have been lost; but the experimental illustration is in the manner of Empedokles.

113. It will be observed that day and night have been explained without reference to the sun. Day is produced by the light of the fiery diurnal hemisphere, while night is the shadow thrown by the earth when the fiery hemisphere is on the other side of it (fr. 48). What, then, is the sun? The Plutarchean Stromateis[607] again give us the answer: “The sun is not fire in substance, but a reflexion of fire like that which comes from water.” Plutarch himself makes one of his personages say: “You laugh at Empedokles for saying that the sun is a product of the earth, arising from the reflexion of the light of heaven, and once more ‘flashes back to Olympos with untroubled countenance.’”[608] 275Aetios says:[609] “Empedokles held that there were two suns: one, the archetype, the fire in one hemisphere of the world, filling the whole hemisphere always stationed opposite its own reflexion; the other, the visible sun, its reflexion in the other hemisphere, that which is filled with air mingled with fire, produced by the reflexion of the earth, which is round, on the crystalline sun, and carried round by the motion of the fiery hemisphere. Or, to sum it up shortly, the sun is a reflexion of the terrestrial fire.”

These passages, and especially the last, are by no means clear. The reflexion which we call the sun cannot be in the hemisphere opposite to the fiery one; for that is the nocturnal hemisphere. We must say rather that the light of the fiery hemisphere is reflected by the earth on to the fiery hemisphere itself in one concentrated flash. From this it follows that the appearance which we call the sun is the same size as the earth. We may explain the origin of this view as follows. It had just been discovered that the moon shone by reflected light, and there is always a tendency to give any novel theory a wider application than it really admits of. In the early part of the fifth century B.C., men saw reflected light everywhere; the Pythagoreans held a very similar view, and when we come to them, we shall see why Aetios, or rather his source, expresses it by speaking of “two suns.”

276It was probably in this connexion that Empedokles announced that light takes some time to travel, though its speed is so great as to escape our perception.[610]

“The moon,” we are told, “was composed of air cut off by the fire; it was frozen just like hail, and had its light from the sun.” It is, in other words, a disc of frozen air, of the same substance as the solid sky which surrounds the heavens. Diogenes says that Empedokles taught it was smaller than the sun, and Aetios tells us it was only half as distant from the earth.[611]

Empedokles did not attempt to explain the fixed stars by reflected light, nor even the planets. They were fiery, made out of the fire which the air carried with it when forced beneath the earth by the upward rush of fire at the first separation, as we saw above. The fixed stars were attached to the frozen air; the planets moved freely.[612]

Empedokles was acquainted (fr. 42) with the true theory of solar eclipses, which, along with that of the moon’s light, was the great discovery of this period. He also knew (fr. 48) that night is the conical shadow of the earth, and not a sort of exhalation.

Wind was explained from the opposite motions of the fiery and airy hemispheres. Rain was caused by the compression of the Air, which forced any water there might be in it out of its pores in the form of drops. Lightning was fire forced out from the clouds in much the same way.[613]

277The earth was at first mixed with water, but the increasing compression caused by the velocity of the world’s revolution made the water gush forth, so that the sea is called “the sweat of the earth,” a phrase to which Aristotle objects as a mere poetical metaphor. The saltness of the sea was explained by the help of this analogy.[614]

114. Empedokles went on to show how the four elements, mingled in different proportions, gave rise to perishable things, such as bones, flesh, and the like. These, of course, are the work of Love; but this in no way contradicts the view taken above as to the period of evolution to which this world belongs. Love is by no means banished from the world yet, though one day it will be. At present, it is still able to form combinations of elements; but, just because Strife is ever increasing, they are all perishable.

The possibility of organic combinations depends upon the fact that there is still water in the earth, and even fire (fr. 52). The warm springs of Sicily were a proof of this, not to speak of Etna. These springs Empedokles appears to have explained by one of his characteristic images, drawn this time from the heating of warm baths.[615] It will be noted that his similes are nearly all drawn from human inventions and manufactures.

115. Plants and animals were formed from the four elements under the influence of Love and Strife. 278The fragments which deal with trees and plants are 77-81; and these, taken along with certain Aristotelian statements and the doxographical tradition, enable us to make out pretty fully what the theory was. The text of Aetios is very corrupt here; but it may, perhaps, be rendered as follows:—

Empedokles says that trees were the first living creatures to grow up out of the earth, before the sun was spread out, and before day and night were distinguished; that, from the symmetry of their mixture, they contain the proportion of male and female; that they grow, rising up owing to the heat which is in the earth, so that they are parts of the earth just as embryos are parts of the uterus; that fruits are excretions of the water and fire in plants, and that those which have a deficiency of moisture shed their leaves when that is evaporated by the summer heat, while those which have more moisture remain evergreen, as in the case of the laurel, the olive, and the palm; that the differences in taste are due to variations in the particles contained in the earth and to the plants drawing different particles from it, as in the case of vines; for it is not the difference of the vines that makes wine good, but that of the soil which nourishes them. Aet. v. 26, 4 (R. P. 172).

Aristotle finds fault with Empedokles for explaining the double growth of plants, upwards and downwards, by the opposite natural motions of the earth and fire contained in them.[616] For “natural motions” we must, of course, substitute the attraction of like for like (§ 109). Theophrastos says much the same thing.[617] The growth of plants, then, is to be regarded as an incident in that separation of the elements which Strife is bringing about. Some of the fire which is still beneath the earth (fr. 52) meeting in its upward 279course with earth, still moist with water and “running” down so as to “reach its own kind,” unites with it, under the influence of the Love still left in the world, to form a temporary combination, which we call a tree or a plant.

At the beginning of the pseudo-Aristotelian Treatise on Plants,[618] we are told that Empedokles attributed desire, sensation, and the capacity for pleasure and pain to plants, and he rightly saw that the two sexes are combined in them. This is mentioned by Aetios, and discussed in the pseudo-Aristotelian treatise. If we may so far trust that Byzantine translation from a Latin version of the Arabic,[619] we get a most valuable hint as to the reason. Plants, we are there told, came into being “in an imperfect state of the world,”[620] in fact, at a time when Strife had not so far prevailed as to differentiate the sexes. We shall see that the same thing applies to the original race of animals in this world. It is strange that Empedokles never observed the actual process of generation in plants, but confined himself to the statement that they spontaneously “bore eggs” (fr. 79), that is to say, fruit.

116. The fragments which deal with the evolution of animals (57-62) must be understood in the light of the statement (fr. 17) that there is a double coming into being and a double passing away of mortal things. Empedokles describes two processes of evolution, which take exactly opposite courses, one of them 280belonging to the period of Love and the other to that of Strife. The four stages of this double evolution are accurately distinguished in a passage of Aetios,[621] and we shall see that there is evidence for referring two of them to the second period of the world’s history and two to the fourth.

The first stage is that in which the various parts of animals arise separately. It is that of heads without necks, arms without shoulders, and eyes without foreheads (fr. 57). It is clear that this must be the first stage in what we have called the fourth period of the world’s history, that in which Love is coming in and Strife passing out. Aristotle distinctly refers it to the period of Love, by which, as we have seen, he means the period when Love is increasing.[622] It is in accordance with this that he also says these scattered members were subsequently put together by Love.[623]

The second stage is that in which the scattered limbs are united. At first, they were combined in all possible ways (fr. 59). There were oxen with human heads, creatures with double faces and double breasts, and all manner of monsters (fr. 61). Those of them that were fitted to survive did so, while the rest perished. That is how the evolution of animals took place in the period of Love.[624]

281The third stage belongs to the period when the unity of the Sphere is being destroyed by Strife. It is, therefore, the first stage in the evolution of our present world. It begins with “whole-natured forms” in which there is not as yet any distinction of sex or species.[625] They are composed of earth and water, and are produced by the upward motion of fire which is seeking to reach its like.

In the fourth stage, the sexes and species have been separated, and new animals no longer arise from the elements, but are produced by generation. We shall see presently how Empedokles conceived this to operate.

In both these processes of evolution, Empedokles was guided by the idea of the survival of the fittest. Aristotle severely criticises this. “We may suppose,” he says, “that all things have fallen out accidentally just as they would have done if they had been produced for some end. Certain things have been preserved because they had spontaneously acquired a fitting structure, while those which were not so put together have perished and are perishing, as Empedokles says of the oxen with human faces.”[626] This, according to Aristotle, leaves too much to chance. One curious instance has been preserved. Vertebration was explained by saying that an early invertebrate animal tried to turn round and broke its back in so doing. This was a favourable variation and so survived.[627] It should be noted that it clearly belongs to the period of Strife, and not, like 282the oxen with human heads, to that of Love. The survival of the fittest was the law of both processes of evolution.

117. The distinction of the sexes was an important result of the gradual differentiation brought about by the entrance of Strife into the world. Empedokles differed from the theory given by Parmenides in his Second Part (§ 95) in holding that the warm element preponderated in the male sex, and that males were conceived in the warmer part of the uterus (fr. 65). The fœtus was formed partly from the male and partly from the female semen (fr. 63); and it was just the fact that the substance of a new being’s body was divided between the male and the female that produced desire when the two were brought together by sight (fr. 64). A certain symmetry of the pores in the male and female semen is, of course, necessary for procreation, and from its absence Empedokles explained the sterility of mules. The children most resemble that parent who contributed most to their formation. The influence of statues and pictures was also noted, however, as modifying the appearance of the offspring. Twins and triplets were due to a superabundance and division of the semen.[628]

As to the growth of the fœtus in the uterus, Empedokles held that it was enveloped in a membrane, and that its formation began on the thirty-sixth day and was completed on the forty-ninth. The heart was formed first, the nails and such things last. Respiration did not begin till the time of birth, when the fluids round the fœtus were withdrawn. Birth took place in the ninth or seventh month, because the day had 283been originally nine months long, and afterwards seven. Milk arises on the tenth day of the eighth month (fr. 68).[629]

Death was the final separation by Strife of the fire and earth in the body, each of which had all along been striving to “reach its own kind.” Sleep was a temporary separation to a certain extent of the fiery element.[630] At death the animal is resolved into its elements, which perhaps enter into fresh combinations, perhaps become permanently united with “their own kind.” There can be no question here of an immortal soul.

Even in life, we may see the attraction of like to like operating in animals just as it did in the upward and downward growth of plants. Hair is the same thing as foliage (fr. 82); and, generally speaking, the fiery part of animals tends upwards and the earthy part downwards, though there are exceptions, as may be seen in the case of certain shell-fish (fr. 76), where the earthy part is above. These exceptions are only possible because there is still a great deal of Love in the world. We also see the attraction of like for like in the different habits of the various species of animals. Those that have most fire in them fly up into the air; those in which earth preponderates take to the earth, as did the dog which always sat upon a tile.[631] Aquatic animals are those in which water predominates. This does not, however, apply to fishes, which are very fiery, and take to the water to cool themselves.[632]

284Empedokles paid great attention to the subject of respiration, and his very ingenious explanation of it has been preserved in a continuous form (fr. 100). We breathe, he held, through all the pores of the skin, not merely through the organs of respiration. The cause of the alternate inspiration and expiration of the breath was the movement of the blood from the heart to the surface of the body and back again, which was explained by the klepsydra.

The nutrition and growth of animals is, of course, to be explained from the attraction of like to like. Each part of the body has pores into which the appropriate food will fit. Pleasure and pain were derived from the absence or presence of like elements, that is, of nourishment which would fit the pores. Tears and sweat arose from a disturbance which curdled the blood; they were, so to say, the whey of the blood.[633]