Aristippus in Harpers Dictionary of Classical Antiquities
（Ἀρίστιππος). A Greek philosopher, a native of Cyrené and a pupil of Socrates, after whose death in B.C. 399 he travelled about the Greek cities, imparting instruction for money. He was founder of the Cyrenaic School, or the system of Hedonism (from ἡδονή, pleasure). His doctrine was that as a basis for human knowledge the only things real and true are our sensations, and not the external objects that produce them; that the aim of life is what all living things strive after, pleasure; and that virtue is only so far a good thing as it tends to the production of pleasure. The wise man shows his wisdom in governing his desires; mental training, indeed, being the only thing which can qualify us for real enjoyment. In pleasure there is no difference of kind, only of degree and duration. Aristippus's writings seem to have disappeared early; five letters, in the Doric dialect, which have come down under his name are undoubtedly spurious. See Ueberweg, Hist. of Philosophy, pp. 59-98, Eng. trans. (N. Y. 1872); his life by Diogenes Laertius; and the articles Cyrenaici; Epicurus; Philosophia.
Aristippus in Wikipedia
Aristippus (Greek: Ἀρίστιππος) of Cyrene, (c. 435-c. 356 BCE), was the founder of the Cyrenaic school of Philosophy. He was a pupil of Socrates, but adopted a very different philosophical outlook, teaching that the goal of life was to seek pleasure by adapting circumstances to oneself and by maintaining proper control over both adversity and prosperity. Among his pupils was his daughter Arete.
Aristippus, the son of Aritades, was born at Cyrene, c. 435 BCE. He came over to Greece to be present at the Olympic games, where he fell in with Ischomachus the agriculturist, and by his description was filled with so ardent a desire to see Socrates, that he went to Athens for the purpose, and remained with him almost up to the time of his execution, 399 BCE. Diodorus dates him to 366 BCE, which agrees very well with the facts known about him, and with the statement, that Lais, the courtesan with whom he was intimate, was born 421 BCE.
Though a disciple of Socrates, he wandered very far both in principle and practice from the teaching and example of his great master. He lived luxuriously; he was happy to seek sensual gratification, and the company of the notorious Lais; he took money for his teaching, and told Socrates that he resided in a foreign land in order to escape the trouble of involving himself in the politics of his native city. He passed part of his life at the court of Dionysius I of Syracuse or Dionysius the Younger, and is also said to have been taken prisoner by Artaphernes, the satrap who drove the Spartans from Rhodes, 396 BCE. He appears, however, at last to have returned to Cyrene, and there he spent his old age.
In Book VI of De architectura, Vitruvius describes Aristippus:
It is related of the Socratic philosopher Aristippus that, being shipwrecked and cast ashore on the coast of the Rhodians, he observed geometrical figures drawn thereon, and cried out to his companions: "Let us be of good cheer, for I see the traces of man." With that he made for the city of Rhodes, and went straight to the gymnasium. There he fell to discussing philosophical subjects, and presents were bestowed upon him, so that he could not only fit himself out, but could also provide those who accompanied him with clothing and all other necessaries of life. When his companions wished to return to their country, and asked him what message he wished them to carry home, he bade them say this: that children ought to be provided with property and resources of a kind that could swim with them even out of a shipwreck.
The anecdotes which are told of him, and of which there are lots in Diogenes Laertius, by no means give us the notion of a person who was the mere slave of his passions, but rather of one who took a pride in extracting enjoyment from all circumstances of every kind, and in controlling adversity and prosperity alike. They illustrate and confirm the two statements of Horace, that to observe the precepts of Aristippus is "to endeavour to adapt circumstances to myself, not myself to circumstances" and that, "every complexion of life, every station and circumstance sat gracefully upon him." Thus when reproached for his love of bodily indulgences, he answered, that "it is not abstinence from pleasures that is best, but mastery over them without ever being worsted." When Dionysius, provoked at some of his remarks, ordered him to take the lowest place at table, he said, "You wish to dignify the seat." Whether he was prisoner to a satrap, or grossly insulted and even spit upon by a tyrant, or enjoying the pleasures of a banquet, or reviled for faithlessness to Socrates by his fellow-pupils, he maintained the same calm temper. He seemed insulting to Xenophon and Plato, as seen from the Memorabilia, where he maintains a discussion against Socrates in defence of voluptuous enjoyment, and from the Phaedo, where his absence at the death of Socrates, though he was only at Aegina, 200 stadia from Athens, is doubtless mentioned as a reproach. Aristotle, too, calls him a sophist, and notices a story of Plato speaking to him, with rather undue vehemence, and of his replying with calmness.
He imparted his doctrine to his daughter Arete, by whom it was communicated to her son, Aristippus the Younger, and by him it was said to have been reduced to a system. Diogenes Laertius, on the authority of Sotion and Panaetius, gives a long list of books whose authorship is ascribed to Aristippus, though he also says that Sosicrates of Rhodes states that he wrote nothing. Some letters attributed to him are forgeries.
On Ancient Luxury
One work attributed to "Aristippus" in ancient times was a scandalous work entitled On Ancient Luxury (or On the Luxury of the Ancients Greek: Περὶ παλαιᾶς τρυφῆς). This work, judging by the quotations preserved by Diogenes Laertius, was filled with spicy anecdotes about philosophers and their supposed taste for boy-lovers and courtesans. Thus the author supports his claims for Plato's various erotic relationships through his quotation of epigrams attributed to the philosopher; and makes an extreme allegation that Periander committed incest with his own mother. That this work cannot have been written by Aristippus of Cyrene has long been realised, not least because the author mentions Theophrastus who lived a generation after Aristippus. but the name may have been adopted by the writer to suggest a connection with the hedonistic philosopher.