This essay strives to illustrate the unusual philosophical category of exaiphnēs (“sudden ; instant”) which is testified in Damascius’ De principiis ; Damascius is the last diadochus of Neoplatonic Academy. It will be illustrated how Damascius takes up a rare idea contained in Plato’s Parmenides on the sudden, rigorously adjusting this notion to describe the irreducible transcendence of the ineffable principle with respect to the One, just like the sudden bursts into time without belonging to it. It will therefore be shown how this specificity of exaiphnēs appears to be taken up and enhanced in a Christological key about the Incarnation by Dionysius ps.‑Areopagite, turning somehow the theoretical reflection of the contemporary pagan philosopher Damascius into a Christian one.

This article proposes a follow up of Fazzo’s contributions on the stemma codicum of Aristotle’s Metaphysics – including her Chora 2015 paper, its completion in the 2017 Revue d’Histoire des Textes and, most recently, a contribution on the text of Zeta 17 in Aristotelica 1 2022. All of these are summarized and framed here in the context of today’s lively debate. We then introduce the data of Marco Ghione’s collation and comparison of the readings of the two oldest manuscripts J and E : J, the Vind. phil. gr. 100, early 9th century – the so‑called “Aristotle of Vienna” – is thus extensively compared with E, Paris. gr. 1853, early 10th century, with selected reference to the earliest hands at work (J, J2, E1). Based on Paul Maas’ theory of errors, we are now in condition to face the crucial issue : does the latter depend on the former ? This helps resolving the one residual opacity or incertitude concerning the upper part of the Metaphysics’ stemma.