I am a citizen of the world.
Kosmopolites eimi.

Philosophers
Diogenes of Sinope
Born around 412 BCE in the Black Sea port of Sinope, Diogenes was the quintessential Cynic philosopher of ancient Greece. He chose a large storage jar as his dwelling, rejected wealth, fame, and social convention, and lived a life of radical self-sufficiency. His anecdotes — carrying a lamp in daylight 'searching for a human being,' telling Alexander the Great to stop blocking his sunlight — symbolize the pursuit of an unadorned existence. His thoroughgoing philosophy of autarkeia (self-sufficiency) became a wellspring of Stoicism.
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Source: ディオゲネス・ラエルティオス『ギリシア哲学者列伝』第6巻63節Verified