i. 8; 324 b 26. Some thought that each sense impression was received through certain pores from the last and strongest agent which entered, and they say that after this manner we see and hear and perceive by all the other senses, and further that we see through air and water and transparent substances because they have pores that are invisible by reason of their littleness, and are close together in series; and the more transparent substances have more pores. Many made definite statements after this manner in regard to certain things, as did Empedokles, not only in regard to active and passive bodies, but he also says that those bodies are mingled, the pores of which agree with each other.... i. 8; 325 a 34. From what is truly _one_ multiplicity could not arise, nor yet could unity arise from what is truly manifold, for this is impossible; but as Empedokles and some others say, beings are affected through pores, so all change and all happening arises after this manner, separation and destruction taking place through the void, and in like manner growth, solid bodies coming in gradually. For it is almost necessary for Empedokles to say as Leukippos does; for there are some solid and indivisible bodies, unless pores are absolutely contiguous. 325 b 19. But as for Empedokles, it is evident that he holds to genesis and destruction as far as the elements are concerned, but how the aggregate mass of these arises and perishes, it is not evident, nor is it possible for one to say who denies that there is an element of fire, and in like manner an element of each other thing—as Plato wrote in the Timaeos. ii. 3; 330 b 19. And some say at once that there are four elements, as Empedokles. But he combines them into two; for he sets all the rest over against fire. ii. 6; 333 b 20. Strife then does not separate the elements, but Love separates those which in their origin are before god; and these are gods. _Meteor._ 357 a 24. In like manner it would be absurd if any one, saying that the sea is the sweat of the earth, thought he was saying anything distinct and clear, as for instance Empedokles; for such a statement might perhaps be sufficient for the purposes of poetry (for the metaphor is poetical), but not at all for the knowledge of nature. 369 b 11. Some say that fire originates in the clouds; and Empedokles says that this is what is encompassed by the rays of the sun. _De anim._ i. 2; 404 b 7. As many as pay careful attention to the fact that what has soul is in motion, these assume that soul is the most important source of motion; and as many as consider that it knows and perceives beings, these say that the first principle is soul, some making more than one first principle and others making one, as Empedokles says the first principle is the product of all the elements, and each of these is soul, saying (Vv. 333-335).