
He criticized Plato, disputed his interpretation of Socrates, and sabotaged his lectures, sometimes distracting listeners by bringing food and eating during the discussions. He became notorious for his philosophical stunts, such as carrying a lamp during the day, claiming to be looking for an honest man. He begged for a living and often slept in a large ceramic jar in the marketplace. There are many tales about his dogging Antisthenes' footsteps and becoming his "faithful hound". He declared himself a cosmopolitan and a citizen of the world rather than claiming allegiance to just one place.

He had a reputation for sleeping and eating wherever he chose in a highly non-traditional fashion, and took to toughening himself against nature.

He used his simple life-style and behaviour to criticize the social values and institutions of what he saw as a corrupt, confused society. He modeled himself on the example of Heracles, and believed that virtue was better revealed in action than in theory. After being exiled, he moved to Athens and criticized many cultural conventions of the city.

His father minted coins for a living, and Diogenes was banished from Sinope when he took to debasement of currency. He was born in Sinope, an Ionian colony on the Black Sea, in 412 or 404 BC and died at Corinth in 323 BC. Crates of Thebes, other Cynics, the Stoics, Wolfi Landstreicher, Han Ryner, Michel Onfray, Søren Kierkegaardĭiogenes ( / d aɪ ˈ ɒ dʒ ə ˌ n iː z/ Greek: Διογένης, Diogenēs ), also known as Diogenes the Cynic ( Ancient Greek: Διογένης ὁ Κυνικός, Diogenēs ho Kynikos), was a Greek philosopher and one of the founders of Cynic philosophy.
