The So-Called Eighth Stromateus by Clement of Alexandria

Early Christian reception of Greek scientific methodology


The so-called eighth Stromateus (‘liber logicus’) by Clement of Alexandria (d. before 221 C.E.) is an understudied source for ancient philosophy, particularly the tradition of the Aristotelian methodology of science, scepticism, and the theories of causation. A series of capitula dealing with inquiry and demonstration, it bears but few traces of Christian interests.

In this volume, Matyáš Havrda provides a new edition, translation, and lemmatic commentary of the text. The vexing question of the origin of this material and its place within Clement’s oeuvre is also addressed. Defending the view of ‘liber logicus’ as a collection of excerpts made or adopted by Clement for his own (apologetic and exegetical) use, Havrda argues that its source could be Galen’s lost treatise On Demonstration.
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Biographical Note

Matyáš Havrda, Ph.D. (2000), Charles University Prague, is a senior researcher at the Institute of Philosophy of the Czech Academy of Sciences. He has published studies on Clement of Alexandria and Galen and edited the collection of essays The Seventh Book of The Stromateis (Brill, 2012).

Review Quotes

“this is a truly excellent monograph, which should bring an obscure text to the greater readership it deserves. Havrda’s important work shows how vital it is for those interested in ancient medicine to examine Christian texts as well, which often contain testimony of philosophical and scientific theory otherwise lost.” -Dawn LaValle Norman, Magdalen College, University of Oxford, Bryn Mawr Classical Review 2017.09.38

"Havrda's study is a work of consummate erudition, published at an apposite moment for patristics, ancient philosophy, and potentially early imperial literary scholarship---though his own weight of attention and interest is clearly pointed toward the philosophical tradition." - Jane Heath, University of Durham, The Expository Times 129(10)

Table of contents



Introduction. The Riddle of the ‘Eighth Stromateus’: Questions and Solutions
Ancient and Byzantine Testimonies
Composition and Contents
Modern Interpretations
Liber logicus

The So-Called Eighth Stromateus (‘Liber logicus’) by Clement of Alexandria: Greek Text, Translation, and Commentary
Prefatory Note to the Greek Text and Translation
Greek Text and Translation
(i) 1, 1–2, 5: ‘Seek and You Will Find’
(ii) 3, 1–(iii) 8, 3: Teaching on Demonstration
(iii) 8, 4–(v) 15, 1: Method of Discovery
(v) 15, 2–16 3: Suspension of Judgement i
(vi) 17, 1–21, 6: Division and Definition
(vii) 22, 1–4: Suspension of Judgement ii
(viii) 23, 1–24, 9: Categories
(ix) 25, 1–33, 9: Causes


Index of Modern Authors
Index of Subjects and Names
Index of Sources


Those interested in the reception history of Aristotelian logic (particularly the theory of demonstration, division, definition, and the ‘categories’), Pyrrhonism, ancient theories of causation (Stoic, Peripatetic, medical), and Galenic methodology.