Metrodorus of Chios ( grc-gre, Μητρόδωρος ὁ Χῖος; fl. 4th century BC) was a Greek philosopher, belonging to the school of

Democritus Democritus (; el, Δημόκριτος, ''Dēmókritos'', meaning "chosen of the people"; – ) was an Ancient Greek pre-Socratic philosopher from Abdera, primarily remembered today for his formulation of an atomic theory of the universe. No ...

, and an important forerunner of

Epicurus Epicurus (; grc-gre, Ἐπίκουρος ; 341–270 BC) was an ancient Greek philosopher and sage who founded Epicureanism, a highly influential school of philosophy. He was born on the Greek island of Samos to Athenian parents. Influence ...

. Metrodorus was a pupil of Nessus of Chios, or, as some accounts prefer, of

himself.

Diogenes Laërtius Diogenes Laërtius ( ; grc-gre, Διογένης Λαέρτιος, ; ) was a biographer of the Greek philosophers. Nothing is definitively known about his life, but his surviving ''Lives and Opinions of Eminent Philosophers'' is a principal sour ...

, ix. 58 He is said to have taught Diogenes of Smyrna, who, in turn, taught Anaxarchus. Metrodorus was a complete

sceptic Skepticism, also spelled scepticism, is a questioning attitude or doubt toward knowledge claims that are seen as mere belief or dogma. For example, if a person is skeptical about claims made by their government about an ongoing war then the p ...

. He accepted the Democritean theory of atoms and void and the plurality of worlds. Includes references. He also held a theory of his own that the

star A star is an astronomical object comprising a luminous spheroid of plasma (physics), plasma held together by its gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked ...

s are formed from day to day by the

moisture Moisture is the presence of a liquid, especially water, often in trace amounts. Small amounts of water may be found, for example, in the air (humidity), in foods, and in some commercial products. Moisture also refers to the amount of water vapo ...

in the

air The atmosphere of Earth is the layer of gases, known collectively as air, retained by Earth's gravity that surrounds the planet and forms its planetary atmosphere. The atmosphere of Earth protects life on Earth by creating pressure allowing f ...

under the heat of the

Sun The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core. The Sun radiates this energy mainly as light, ultraviolet, and infrared radi ...

. According to

Cicero Marcus Tullius Cicero ( ; ; 3 January 106 BC – 7 December 43 BC) was a Roman statesman, lawyer, scholar, philosopher, and academic skeptic, who tried to uphold optimate principles during the political crises that led to the esta ...

he said, "We know nothing, no, not even whether we know or not" and maintained that everything is to each person only what it appears to him to be. Metrodorus is especially interesting as a forerunner of Anaxarchus, and as a connecting link between

atomism Atomism (from Greek , ''atomon'', i.e. "uncuttable, indivisible") is a natural philosophy proposing that the physical universe is composed of fundamental indivisible components known as atoms. References to the concept of atomism and its atom ...

proper and the later

scepticism Skepticism, also spelled scepticism, is a questioning attitude or doubt toward knowledge claims that are seen as mere belief or dogma. For example, if a person is skeptical about claims made by their government about an ongoing war then the p ...

. The following quote is attributed to him. If accurate, it demonstrates that Metrodorus had a cosmological philosophy that was advanced for the ancient world: "A single ear of

wheat Wheat is a grass widely cultivated for its seed, a cereal grain that is a worldwide staple food. The many species of wheat together make up the genus ''Triticum'' ; the most widely grown is common wheat (''T. aestivum''). The archaeologi ...

in a large field is as strange as a single world in

infinite Infinite may refer to: Mathematics * Infinite set, a set that is not a finite set *Infinity, an abstract concept describing something without any limit Music *Infinite (group), a South Korean boy band *''Infinite'' (EP), debut EP of American m ...

space." Aëtius, ''Placita Philosophorum'' i.5.4

References

{{1911, wstitle=Metrodorus, volume=18, page=300}
Metrodorus
Volume 18, p. 300. 4th-century BC Greek people 4th-century BC philosophers Ancient Greek atomist philosophers Ancient Chians Classical Greek philosophers Ancient Skeptic philosophers