Arete of Cyrene (Greek: Ἀρήτη; fl. 4th century BC) was a Cyrenaic philosopher, and the daughter of Aristippus of Cyrene.
She learned philosophy from her father, Aristippus, who had himself learned philosophy from Socrates. Arete, in turn, taught philosophy to her son - Aristippus the Younger - hence her son was nicknamed "Mother-taught" (Greek: μητροδίδακτος). Arete is sometimes described as the successor of her father as head of the Cyrenaic school, but it may have been her son who formally founded the school.
Among the spurious Socratic epistles (dating perhaps from the 1st century) there is a fictitious letter from Aristippus addressed to Arete. In this letter, Arete is represented as living a fairly prosperous life in Cyrene. Aristippus tells her that "you still have two gardens, enough for a luxurious life; the property in Berenice, even if it alone were left, would not fail to supply you with a very high standard of living." Aristippus suggests to her that, after his death, she should "go to Athens, after you have given Aristippus the best possible education." He suggests that she should live with Xanthippe and Myrto, that she should regard Lamprocles as if he were her own child, and that she should adopt "the daughter of Eubois whom you used to treat as though she were free." Above all he urges her "to care for little Aristippus so that he may be worthy of us and of philosophy; that is the real inheritance I leave him, for in the other aspects of his life he will have the officials in Cyrene as his enemies.
John Augustine Zahm (writing under the pseudonym of Mozans), claimed that the 14th century scholar Giovanni Boccaccio had access to some "early Greek writers," which allowed Boccaccio to give special praise to Arete "for the breadth and variety of her attainments":
She is said to have publicly taught natural and moral philosophy in the schools and academies of Attica for thirty-five years, to have written forty books, and to have counted among her pupils one hundred and ten philosophers. She was so highly esteemed by her countrymen that they inscribed on her tomb an epitaph which declared that she was the splendour of Greece and possessed the beauty of Helen, the virtue of Thirma, the pen of Aristippus, the soul of Socrates and the tongue of Homer.