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O'Meara, Dominic J. Professor of Philosophy, University of Fribourg

P ythagoras Revived

Mathematics and Philosophy in Late Antiquity

Print ISBN 0198239130, 1990

Table of Contents

 

 

Introduction

Part I  

The Revival Of Pythagoreanism In the Neoplatonic School

1.  

Varieties of Pythagoreanism in the Second and Third Centuries ad 9

 

1. Numenius of Apamea 10

 

2. Nicomachus of Gerasa 14

 

3. Anatolius 23

 

4. Porphyry 25

2.  

Iamblichus' Work On Pythagoreanism: Title, Plan, the First Four Books 30

 

1. The Title and Overall Plan 32

 

2. Pythagoras (Book I: On the Pythagorean Life) 35

 

3. Pythagorean Philosophy (Book II: the Protreptic) 40

 

4. Pythagorean Mathematical Science (Book III: On General Mathematical Science) 44

 

5. Arithmetic (Book IV: On Nicomachus' Arithmetical Introduction) 51

3.  

On Pythagoreanism V - VII: The Excerpts in Michael Psellus 53

 

1. Michael Psellus, Philosophical Excerptor 53

 

2. Psellus' Excerpts from On Pythagoreanism V - VII 57

 

3. On Pythagoreanism V 60

 

(i) General Plan 60

 

(ii) Physical Number 62

 

(iii) Formal and Material Causation 62

 

(iv) Efficient Causation 64

 

(v) Change 64

 

(vi) Place 66

 

(vii) The Void 67

 

(viii) Conclusion 68

end p.ix

 

 

 

 

4. On Pythagoreanism VI 70

 

(i) General Plan 70

 

(ii) The First Principles of Ethics 71

 

(iii) The Powers of the Soul 72

 

(iv) Virtue 73

 

(v) Particular Virtues 74

 

(vi) Conclusion 75

 

5. On Pythagoreanism VII 76

 

(i) General Plan 76

 

(ii) Divine Number 79

 

(iii) The Approach by Analogy 81

 

(iv) Conclusion 84

4.  

Iamblichus' Work On Pythagoreanism: General Conclusions 86

 

1. On Pythagoreanism: A Brief Review 87

 

2. The Relation of On Pythagoreanism to Iamblichus' Other Works and Interests 91

 

3. Iamblichean Pythagoreanism and its Predecessors 101

Part II  

Iamblichean Pythagoreanism In the Athenian School

5.  

Hierocles 109

 

1. The Introduction of Iamblichean Philosophy at Athens in the Fourth Century 110

 

2. Hierocles on the History of Philosophy 111

 

3. Pythagoreanism in Hierocles' Commentary on the Golden Verses 114

 

4. Conclusion 118

6.  

Syrianus 119

 

1. The History of Philosophy in Syrianus 119

 

2. Philosophy as Revelation in Hermias' Commentary on the Phaedrus 124

 

3. Mathematics and Philosophy in Syrianus' Commentary on the Metaphysics 128

 

(i) Syrianus' Commentary and Iamblichus' On Pythagoreanism 128

 

(ii) The Tripartite Structure of Reality in Syrianus 131

end p.x

 

 

 

 

(iii) Number and the Soul 132

 

(iv) 'Physical Number' 134

 

(v) Number in Metaphysics 135

 

(vi) Syrianus and Iamblichus 138

7.  

Proclus: Some Preliminary Issues 142

 

1. The Rivalry with the Mathematician Domninus of Larissa 143

 

2. Plato and Pythagoras 145

 

3. The Theory of Superior Souls 149

 

4. Learning, Discovery, and Revelation 152

8.  

Proclus on Mathematics 156

 

1. General Mathematics 157

 

(i) Iamblichus' On Pythagoreanism III and Proclus' On Euclid Prol. I 157

 

(ii) Proclus' Revisions of Iamblichus 164

 

2. Arithmetic and (or?) Geometry 166

 

3. Geometry 170

 

(i) The Composition of On Euclid Prol. II 170

 

(ii) Euclid as Platonist 170

 

(iii) The Method of Geometry 171

 

(iv) The Transposition of Geometry 173

 

4. Conclusions 175

9.  

Mathematics and Physics in Proclus 177

 

1. Aristotle's Physics Geometricized 177

 

2. Plato's Timaeus as 'Pythagorean' Physics 179

 

3. The Geometrical Method of Plato's Physics 181

 

4. Is Physics a Science? 182

 

5. The Application of Mathematical Truths in Physics 185

 

6. Concluding Comment 192

10.  

Mathematics and Metaphysics in Proclus 195

 

1. The Elements of Theology: A Geometrical Metaphysics? 196

 

2. The Science of Dialectic 198

 

3. Mathematical Theology and Dialectic 204

 

4. Concluding Comment 208

 

Conclusion 210

end p.xi

 

 

Appendices

 

I. The Excerpts from Iamblichus' On Pythagoreanism V - VII in Psellus: Text, Translation, and Notes 217

 

II. The Arabic Commentaries on the Golden Verses attributed to Iamblichus and Proclus 230

 

Bibliography 233

 

1. Ancient Authors 233

 

2. Modern Authors 236

 

Index 247

end p.xii

Preface

Research begun many years ago with the support of a Junior and Visiting Fellowship at the Dumbarton Oaks Center for Byzantine Studies brought me to the texts and theses explored in this book. A sabbatical grant and generous leave of absence from The Catholic University of America and a grant provided in ideal circumstances by the Alexander von Humboldt-Stiftung allowed me to develop these theses. Completion of the book was made possible by the support made available by the Université de Fribourg. I am also much indebted to friends and colleagues for their assistance. Henri-Dominique Saffrey made many helpful suggestions and corrections for which I am grateful, as I am to Oxford University Press's reader for constructive and detailed comments. Ilsetraut Hadot also proposed improvements to the book, which is indebted to her research as it is to the work of Pierre Hadot, a longstanding source of inspiration for me. Leendert Westerink and John Duffy were unfailing in their expert assistance. I am particularly grateful to Werner Beierwaltes: he put me on the track of Iamblichus and gave me invaluable advice and help during my stay in Freiburg-im-Breisgau and Munich. The deficiencies that remain in the book are of course mine. My wife Carra gave my work her full encouragement and support throughout many years. Amy Eiholzer-Silver prepared the typescripts of the final revisions of the book with intelligent care.

In an effort to simplify footnotes as far as possible, I have adopted the practice of referring to modern works by the name of the author and the year of publication: further details may be found in the second part of the Bibliography. The texts of ancient authors are cited by page and line in the editions listed in the first part of the Bibliography (for fragments, by fragment number and line). In cases where this seemed appropriate, I have added a chapter number before the page reference (e.g. I ch. 2, 3=vol. I, chapter 2, page 3). Translations are mine, unless otherwise noted. The following standard abbreviations are used:

CAG  

Commentaria in Aristotelem Graeca, Berlin, 1870 ff.

DK  

H. Diels, W. Kranz, Die Fragmente der Vorsokratiker, Berlin, 1952.

end p.vii

LSJ  

Liddell, Scott, Jones, GreekEnglish Lexicon.

RE  

Pauly, Wissowa, Kroll, Realencyclopädie der classischen Altertumswissenschaft.

SVF  

Stoicorum veterum fragmenta, ed. H. von Arnim, Leipzig, 1905-24.

This book was completed early in 1986. I have tried to include mention of what has been published since, but have only been able to take account to a limited extent in particular of the important Paris colloquium on Proclus: Proclus, lecteur et interprète des anciens, ed. J. Pépin, H.-D. Saffrey, Paris 1987.

D.J.O'M.

Fribourg, Switzerland

Christmas 1987

end p.viii