The aim of this paper, which is devoted to the Proclean Commentary on the Alcibiades I, is to explain not only why this dialogue is so popular in Neoplatonism, i.e. why it is considered the foundation of Plato’s teaching, but also its methodological importance for reading the proems of the dialogues. For, in my opinion, it has not yet been properly investigated whether and why the two issues, i.e. the introductory importance and the importance for grasping the relevance of the (...) proems, are closely linked. I will therefore first try to show how the isagogical questions are perfectly embedded in a philosophical system that has redefined the very criteria of textual analysis around the idea that each dialogue is a literary microcosm analogous to the macrocosmic universe. I will then show how the exegetical methods proposed by Proclus in his Commentary on the Alcibiades are influenced by certain theoretical assumptions that are useful for reading the dialogues in general, and finally I will demonstrate how the proem of the Alcibiades allows us to re-evaluate the importance of the proems that Plato appended to his writings. (shrink)