Elements and Matter in Diogenes Laertius 7.137

A sentence in Book 7 of Diogenes Laertius’s Lives states that, according to the Stoics, the four elements are “unqualified substance, i.e. matter.” Scholars have noted that this appears to conflict with the Stoics’ distinction between principles and elements. Different solutions have been proposed, from dismissing the sentence entirely to emending the text. This note proposes a new interpretation according to which the standard reading of the text can be retained.