Aristippus the Younger (/ˌærəˈstɪpəs/; Ancient Greek: Ἀρίστιππος; born c. 380 BC), of Cyrene, was a Cyrenaic philosopher in the second half of the 4th century BC.
According to Diogenes Laërtius, he received the nickname "Mother-taught" (metrodidaktos).
[1] because he learned philosophy from his mother, Arete of Cyrene, who was the daughter of the elder Aristippus.
[2] According to Aristocles of Messene, as quoted by Eusebius, he may have formalized the principles of Cyrenaic philosophy.
For he said that there are three states affecting our temperament: one, in which we feel pain, like a storm at sea; another, in which we feel pleasure, that may be likened to a gentle undulation, for pleasure is a gentle movement, comparable to a favourable breeze; and the third is an intermediate state, in which we feel neither pain nor pleasure, which is similar to a calm.