Empedokles: Trees first of living beings sprang from the earth, before the sun was unfolded in the heavens and before day and night were separated; and by reason of the symmetry of their mixture they contain the principle of male and female; and they grow, being raised by the warmth that is in the earth, so that they are parts of the earth, just as the fœtus in the belly is part of the womb; and the fruits are secretions of the water and fire in the plants; and those which lack (sufficient) moisture shed their leaves in summer when it is evaporated, but those which have more moisture keep their leaves, as in the case of the laurel and the olive and the date-palm; and differences in their juices are (due to) variations in the number of their component parts, and the differences in plants arise because they derive their homoeomeries from (the earth which) nourishes them, as in the case of grape-vines; for it is not the kind of vine which makes wine good, but the kind of soil which nurtures it. v. 26; 440. Empedokles: Animals are nurtured by the substance of what is akin to them [moisture], and they grow with the presence of warmth, and grow smaller and die when either of these is absent; and men of the present time, as compared with the first living beings, have been reduced to the size of infants (?). v. 28; 440. Empedokles: Desires arise in animals from a lack of the elements that would render each one complete, and pleasures.... Theophr. _Phys. opin._ 3; _Dox._ 478. Empedokles of Agrigentum makes the material elements four: fire and air and water and earth, all of them eternal, and changing in amount and smallness by composition and separation; and the absolute first principles by which these four are set in motion, are Love and Strife; for the elements must continue to be moved in turn, at one time being brought together by Love and at another separated by Strife; so that in his view there are six first principles; for sometimes he gives the active power to Love and Strife, when he says (vv. 67-68): ‘Now being all united by Love into one, now each borne apart by hatred engendered of Strife;’ and again he ranks these as elements along with the four when he says (vv. 77-80): ‘And at another time it separated so that there were many out of the one; fire and water and earth and boundless height of air, and baneful Strife apart from these, balancing each of them, and Love among them, their equal in length and breadth.’ Fr. 23; _Dox._ 495. Some say that the sea is as it were a sort of sweat from the earth; for when the earth is warmed by the sun it gives forth moisture; accordingly it is salt, for sweat is salt. Such was the opinion of Empedokles.