This article aims to present the relation between Diogenes of Oinoanda maxims and what we have as genuinely epicurean, i.e, with the material (letters, maxims and fragments) admitted as undisputed authorship of Epicurus. With this presentation, we show the strength of the orthodoxy Epicurus‟s doctrine, because generally speaking there are no differences between what Epicurus taught in Athens in the 3rd century BC and what Diogenes of Oinoanda claimed to be Epicureanism in the 2nd century AD. In fact, there is a single maxim that does not seem to follow Epicurus‟s doctrine (Diog. Oen. 107). However, this divergence is justified by the fact that this maxim is fragmented. Thus we believe that this article is a positive contribution to the acad...