Cicero, in writing against Epicurus, preserves for us (1) confirmation of Epicurus' focus on pleasure as the goal, with virtue being value only as an instrument of pleasure, as the heart of his doctrine, and (2) a statement of Metrodorus emphasizing the importance of a "strong constitution of body" and a "reasonable expectation of continuing" the same. From De Officiis, Peabody translation.
https://archive.org/details/et…tingso00ciceiala/page/244