Empedocles had Pythagoreans as pupils, and went about with them; he is sometimes considered to have been a Pythagorean like Parmenides and Zeno, but this is the only ground for such a statement. It is a question whether he belonged to the League; his philosophy has no resemblance to the Pythagorean. According to Diogenes Laertius (VIII. 56), he was also called Zeno’s fellow-pupil. There have, indeed, been many isolated reflections of a physical kind preserved to us, as also some words of exhortation, and in him thought as penetrating within reality, and the knowledge of nature seem to have attained to greater breadth and compass; we find in him, however, less speculative depth than in Heraclitus, but a Notion more imbued with the point of view of reality, and a culture derived from natural philosophy or the contemplation of nature. Empedocles is more poetic than definitely philosophical; he is not very interesting, and much cannot be made of his philosophy. As to the particular Notion which governs it, and which really begins in it to appear, we may call it Combination or Synthesis. It is as combination that the unity of opposites first presents itself; this Notion, first opening up with Heraclitus, is, while in a condition of rest, conceived of as combination, before thought grasps the universal in Anaxagoras. Empedocles’ synthesis, as a completion of the relationship, thus belongs to Heraclitus, whose speculative Idea, though in reality, is process, but this is so without the individual moments in reality being mutually related as Notions. Empedocles’ conception of synthesis holds good to the present day. He also is the originator of the common idea that has even come down to us, of regarding the four known physical elements of fire, air, water, and earth, as fundamental; by chemists they are certainly no longer held to be elements, because they understand by elements a simple chemical substance. I will now give Empedocles’ ideas shortly, and draw the many units mentioned into the connection of a whole.