The book "Proclus" by Werner Beierwaltes offers an in-depth analysis of the central questions of Neoplatonism, particularly the identity of thought and being. It illuminates the complex dialectic between distinction and connection, as well as the relationship between identity and difference. Beierwaltes demonstrates how Proclus is regarded as a key figure in the history of Greek thought and how his metaphysics is considered the pinnacle of ancient thinking. The work combines historical and factual aspects, providing both retrospectives and perspectives on the history of philosophy. It is a significant work for research on Neoplatonism and sets new standards in this field.