Pasion was born some time before 430 BC. He was owned by the bankers Antisthenes and Archestratus, who had a bank at the Piraeus, the harbor five miles out of Athens. During his slavery, he quickly rose to chief clerk (Argyramoibos) in charge of a money-changing table at the port, and proved so valuable that by 394 BC he had been manumitted as reward for his faithful service.
When his owners retired, Pasion inherited the bank and established a shield factory. The gifts he provided Athens included one thousand shields and a trireme. Ultimately, Pasion was granted Athenian citizenship and started investing in real estate in order to accumulate more wealth. When he became too old to work, Pasion had Phormio, another slave, take care of the bank. When Pasion died in 370 BC his widow married Phormio in order to keep the bank in the family. Pasion had two sons with his wife Archippe: Apollodorus and Pasikles.
- David Matz. Voices of Ancient Greece and Rome: Contemporary Accounts of Daily Life. ABC-CLIO, 1 Mar 2012. Retrieved 2015-02-12.
- Davies, J. K. (1971). Athenian Propertied Families, 600–300 B.C. p. 429.
- Davies, J. K. (1971). Athenian Propertied Families, 600–300 B.C. p. 428.
- Hammond, N.G.L.; Scullard, H.H., eds. (1970). Oxford Classical Dictionary (2 ed.). Oxford: Clarendon Press. p. 786.
- Meltzer (1993), pp. 77–78.
- Hamel, Debra (2003). Trying Neaira. p. 136.
- Meltzer, Milton. Slavery: A World History. Da Capo, 1993. ISBN 0-306-80536-7
- Oxford Classical Dictionary, s.v. Pasion.