Vitae philosophorum
Diogenes Laertius
Diogenes Laertius. Hicks, R. D., editor. Cambridge, MA.: Harvard University Press; London: William Heinemann Ltd., 1925.
hence he has frequently repeated himself and set down the first thought that occurred to him, and in his haste has left things unrevised, and he has so many citations that they alone fill his books: nor is this unexampled in Zeno and Aristotle. Such, then, in number and character are the writings of Epicurus, the best of which are the following:
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The views expressed in these works I will try to set forth by quoting three of his epistles, in which he has given an epitome of his whole system.