This treatise is one of Seneca’s ten moral Dialogues which are preserved on Codex Ambrosianus C 90 inf. (= A), an eleventh century manuscript which was copied at the abbey of Monte Casino. Along with this main source, there is also a considerable number of later manuscripts, from the fourteenth century on, which are of lesser and debatable value (Reynolds 1968). The treatise is addressed to Annaeus Serenus, who held the office of praefectus vigilum under Nero (Pliny NH 22.96) and was still an Epicurean when this particular treatise was written. The treatise is believed to have been written after 47 and plausibly before 62 CE, since, whereas within the framework of this treatise Serenus appears to be an …
Garani, Myrto. "De Constantia Sapientis". The Literary Encyclopedia. First published 28 August 2013; last revised .
[http://www.litencyc.com/php/sworks.php?rec=true&UID=35051, accessed 23 May 2015.]