Thales of Miletus
flourished 6th century BCGreek philosopher.None of his writings survive, and no contemporary sources exist. The claim that Thales was the founder of Western philosophy rests primarily on Aristotle, who wrote that he was the first to suggest a single material substratum for the universe, namely water. Thales' significance lies in his attempt to explain nature by the simplification of phenomena and in his search for causes within nature itself rather than in the caprices of anthropomorphic gods.
* * *▪ Greek philosopherflourished 6th century BCphilosopher renowned as one of the legendary Seven Wise Men, or Sophoi, of antiquity (see philosophy, Western: The pre-Socratic philosophers (philosophy, Western)). He is remembered primarily for his cosmology based on water as the essence of all matter, with the Earth a flat disk floating on a vast sea. The Greek historian Diogenes Laërtius (flourished 3rd century AD), quoting Apollodorus of Athens (flourished 140 BC), placed the birth of Thales during the 35th Olympiad (apparently a transcription error; it should read the 39th Olympiad, c. 624 BC) and his death in the 58th Olympiad (548–545 BC) at the age of 78.No writings by Thales survive, and no contemporary sources exist; thus, his achievements are difficult to assess. Inclusion of his name in the canon of the legendary Seven Wise Men led to his idealization, and numerous acts and sayings, many of them no doubt spurious, were attributed to him, such as “Know thyself” and “Nothing in excess.” According to the historian Herodotus (c. 484–c. 425 BC), Thales was a practical statesman who advocated the federation of the Ionian cities of the Aegean region. The poet-scholar Callimachus (c. 305–c. 240 BC) recorded a traditional belief that Thales advised navigators to steer by the Little Bear (Ursa Minor) rather than by the Great Bear (Ursa Major), both prominent constellations in the Northern Hemisphere. He is also said to have used his knowledge of geometry to measure the Egyptian pyramids and to calculate the distance from shore of ships at sea. Although such stories are probably apocryphal, they illustrate Thales' reputation. The poet-philosopher Xenophanes (c. 560–c. 478 BC) claimed that Thales predicted the solar eclipse (eclipse) that stopped the battle between King Alyattes of Lydia (reigned c. 610–c. 560 BC) and King Cyaxares of Media (reigned 625–585 BC), evidently on May 28, 585. Modern scholars believe, however, that he could not possibly have had the knowledge to predict accurately either the locality or the character of an eclipse. Thus, his feat was apparently isolated and only approximate; Herodotus spoke of his foretelling the year only. That the eclipse was nearly total and occurred during a crucial battle contributed considerably to his exaggerated reputation as an astronomer.Thales has been credited with the discovery of five geometric (geometry) theorems: (1) that a circle is bisected by its diameter, (2) that angles in a triangle opposite two sides of equal length are equal, (3) that opposite angles formed by intersecting straight lines are equal, (4) that the angle inscribed inside a semicircle is a right angle, and (5) that a triangle is determined if its base and the two angles at the base are given. His mathematical achievements are difficult to assess, however, because of the ancient practice of crediting particular discoveries to men with a general reputation for wisdom.The claim that Thales was the founder of European philosophy rests primarily on Aristotle (384–322 BC), who wrote that Thales was the first to suggest a single material substratum for the universe—namely, water, or moisture. A likely consideration in this choice was the seeming motion that water exhibits, as seen in its ability to become vapour; for what changes or moves itself was thought by the Greeks to be close to life itself, and to Thales the entire universe was a living organism, nourished by exhalations from water.Thales' significance lies less in his choice of water as the essential substance than in his attempt to explain nature by the simplification of phenomena and in his search for causes within nature itself rather than in the caprices of anthropomorphic gods. Like his successors the philosophers Anaximander (610–546/545 BC) and Anaximenes Of Miletus (flourished c. 545 BC), Thales is important in bridging the worlds of myth and reason.
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Thales of Miletus — noun a presocratic Greek philosopher and astronomer (who predicted an eclipse in 585 BC) who was said by Aristotle to be the founder of physical science; he held that all things originated in water (624 546 BC) • Syn: ↑Thales • Instance Hypernyms … Useful english dictionary
Thales of Miletus — (fl. 585 BC) One of the Seven Sages of ancient Greece and judged by Aristotle to be the founder of physical science; that is, he was the first Greek to search for the ultimate substance of things, which he identified with water. A polymath, he is … Philosophy dictionary
Thales of Miletus — See Ionians ( … History of philosophy
THALES OF MILETUS — (640 546 B.C.) the Father of Greek PHILOSOPHY who achieved fame when he predicted the solar eclipse of 586 B.C. He argued that water is the origin of everything and the basic substance of the UNIVERSE … Concise dictionary of Religion
Thales — of Miletus … Philosophy dictionary
Thales — von Milet Thales von Milet (griech. Θαλῆς ὁ Μιλήσιος; * um 624 v. Chr. in Milet, Kleinasien; † um 546 v. Chr.) war ein griechischer Naturphilosoph, Staatsmann, Mathematiker, Astronom und Ingenieur. Seit Aristoteles gilt er als Begründer von… … Deutsch Wikipedia
Thales — Infobox Philosopher color = #B0C4DE Thales image caption = Thales name = Thales of Miletos (Θαλής ο Μιλήσιος) birth = ca. 624–625 BC death = ca. 547–546 BC school tradition = Ionian Philosophy, Milesian school, Naturalism main interests = Ethics … Wikipedia
Thalès — Pour les articles homonymes, voir Thalès (homonymie). Thalès (Θαλής) Asie mineure Antiquité … Wikipédia en Français
Thales' theorem — In geometry, Thales theorem (named after Thales of Miletus) states that if A, B and C are points on a circle where the line AC is a diameter of the circle, then the angle ABC is a right angle. Thales theorem is a special case of the inscribed… … Wikipedia
Thales — noun a presocratic Greek philosopher and astronomer (who predicted an eclipse in 585 BC) who was said by Aristotle to be the founder of physical science; he held that all things originated in water (624 546 BC) • Syn: ↑Thales of Miletus •… … Useful english dictionary