This project involves the study of Cicero’s translation into Latin of Epicurean philosophical concepts and terminology. In this analysis I compare Cicero’s translations with the same concepts and terms as they originally appeared in Greek Epicurean texts in order to understand what conceptual changes occurred in translation. I consider the extent to which these changes were due to translation, Cicero’s pro-stoic tendencies and his political agenda. To accomplish this, I first collate the Epicurean terms and concepts that occur in Cicero. I then move onto the Epicurean texts and survey the surviving Epicurean corpus before finding original Epicurean terms and concepts that correspond to Cicero’s translations. I then show how the Epicureans themselves employed the corresponding Greek terms and understood the same concepts.