Thus all these further, as also later, assertions do not justify us in maintaining that Thales comprehended form in the absolute in a definite manner; on the contrary, the rest of the history of philosophical development refutes this view. We see that form certainly seems to be shown forth in existence, but as yet this unity is no further developed. The idea that the magnet has a soul is indeed always better than saying that it has the power of attraction; for power is a quality which is considered as a predicate separable from matter, while soul is movement in unison with matter in its essence. An idea such as this of Thales stands isolated, however, and has no further relation to his absolute thought. Thus, in fact, the philosophy of Thales is comprised in the following simple elements: (_a_) It has constituted an abstraction in order to comprehend nature in a simple sensuous essence. (_b_) It has brought forth the Notion of ground or principle; that is, it has defined water to be the infinite Notion, the simple essence of thought, without determining it further as the difference of quantity. That is the limited significance of this principle of Thales. 2. _Anaximander._ Anaximander was also of Miletus, and he was a friend of Thales. “The latter,” says Cicero (Acad. Quaest. IV. 37), “could not convince him that everything consisted of water.” Anaximander’s father was called Praxiades; the date of his birth is not quite certain; according to Tennemann (vol. I. p. 413), it is put in Olympiad 42, 3 (610 B.C.), while Diogenes Laertius (II. I, 2) says, taking his information from Apollodorus, an Athenian, that in Ol. 58, 2 (547 B.C.), he was sixty-four years old, and that he died soon after, that is to say about the date of Thales’ death. And taking for granted that he died in his ninetieth year, Thales must have been nearly twenty-eight years older than Anaximander. It is related of Anaximander that he lived in Samos with the tyrant Polycrates, where were Pythagoras and Anacreon also. Themistius, according to Brucker (Pt. I. p. 478), says of him that he first put his philosophic thoughts into writing, but this is also recorded of others, as for example, of Pherecydes, who was older than he. Anaximander is said to have written about nature, the fixed stars, the sphere, besides other matters; he further produced something like a map, showing the boundary (_πρίμετρον_) of land and sea; he also made other mathematical inventions, such as a sun-dial that he put up in Lacedæmon, and instruments by which the course of the sun was shown, and the equinox determined; a chart of the heavens was likewise made by him.