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Commentary on the Book of Causes

The Book of Causes , highly influential in the medieval university, was commonly but incorrectly understood to be the completion of Aristotle's metaphysics. It was Thomas Aquinas who first judged it to have been abstracted from Proclus's Elements of Theology , presumably by an unknown Arabic author, who added to it ideas of his own.

The Book of Causes is of particular interest because themes that appear in it are echoed in the metaphysics of its treatment of being (esse) as proceeding from the First Creating Cause; the triadic scheme of being, living, and knowing; and the general scheme of participation in which "all is in all." Thus, the Book of Causes provides a historical backdrop for understanding and appreciating Aquinas's development of these themes in his metaphysics.

Thomas's Commentary on the Book of Causes , composed during the first half of 1272, is a distinct philosophical work in its own right. It provides an extended view of his approach to Neoplatonic thought and functions as a guide to his metaphysics. Though long neglected and, until now, never translated into English, it deserves an equal place alongside his commentaries on Aristotle and Boethius.

In addition to the extensive annotation, bibliography, and thorough introduction, this translation is accompanied by two valuable appendices. The first provides a translation of another version of proposition 29 of the Book of Causes , which was not known to St. Thomas. The second lists citations of the Book of Causes found in the works of St. Thomas and cross-references these to a list showing the works, and the exact location within them, where the citations can be found.

193 pages, Paperback

First published January 1, 1272

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About the author

Thomas Aquinas

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Philosophy of Saint Thomas Aquinas, a Dominican friar and theologian of Italy and the most influential thinker of the medieval period, combined doctrine of Aristotle and elements of Neoplatonism, a system that Plotinus and his successors developed and based on that of Plato, within a context of Christian thought; his works include the Summa contra gentiles (1259-1264) and the Summa theologiae or theologica (1266-1273).

Saint Albertus Magnus taught Saint Thomas Aquinas.

People ably note this priest, sometimes styled of Aquin or Aquino, as a scholastic. The Roman Catholic tradition honors him as a "doctor of the Church."

Aquinas lived at a critical juncture of western culture when the arrival of the Aristotelian corpus in Latin translation reopened the question of the relation between faith and reason, calling into question the modus vivendi that obtained for centuries. This crisis flared just as people founded universities. Thomas after early studies at Montecassino moved to the University of Naples, where he met members of the new Dominican order. At Naples too, Thomas first extended contact with the new learning. He joined the Dominican order and then went north to study with Albertus Magnus, author of a paraphrase of the Aristotelian corpus. Thomas completed his studies at the University of Paris, formed out the monastic schools on the left bank and the cathedral school at Notre Dame. In two stints as a regent master, Thomas defended the mendicant orders and of greater historical importance countered both the interpretations of Averroës of Aristotle and the Franciscan tendency to reject Greek philosophy. The result, a new modus vivendi between faith and philosophy, survived until the rise of the new physics. The Catholic Church over the centuries regularly and consistently reaffirmed the central importance of work of Thomas for understanding its teachings concerning the Christian revelation, and his close textual commentaries on Aristotle represent a cultural resource, now receiving increased recognition.

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31 reviews2 followers
April 15, 2023
This book rekindled my interest in Christianity. It is fascinating to me that Aquinas had access to Proclus' "Elements of Theology", which he references quite often in this book. I think reading and studying the original by Proclus is the best way to understand these ideas. However, this commentary was way more digestible. I may have read a poor translation of Proclus, but either way this book, along with Proclus' "Elements of Theology" is a must read for anyone interested in metaphysics.
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