In Aquinas on Being and Essence: A Translation and Interpretation, Joseph Bobik interprets the doctrines put forth by St. Thomas Aquinas in his treatise On Being and Essence. He foregrounds the meaning of the important distinction between first and second intentions, the differing uses of the term “matter,” and the Thomistic conception of metaphysics.

Gaven Kerr provides the first book-length study of St. Thomas Aquinas's much neglected proof for the existence of God in De Ente et Essentia Chapter 4. He offers a contemporary presentation, interpretation, and defense of this proof, beginning with an account of the metaphysical principles used by Aquinas and then describing how they are employed within the proof to establish the existence of God. Along the way, Kerr engages contemporary authors who have addressed Aquinas's or similar reasoning. The proof developed in the De Ente is, on Kerr's reading, independent of many of the other proofs in Aquinas's corpus and resistant to the traditional classificatory schemes of proofs of God. By applying a historical and hermeneutical awareness of the philosophical issues presented by Aquinas's thought and evaluating such philosophical issues with analytical precision, Kerr is able to move through the proof and evaluate what Aquinas is saying, and whether what he is saying is true. By means of an analysis of one of Aquinas's earliest proofs, Kerr highlights a foundational argument that is present throughout the much more commonly studied Thomistic writings, and brings it to bear within the context of analytical philosophy, showing its relevance to the contemporary reader.

Because a small error in the beginning grows enormous at the end, as the Philosopher remarks in Book 1 of On the Heavens and the World, and being and essence are the first things to be conceived by our understanding, as Avicenna declares in Book 1 of his Metaphysics, in order to avoid falling into error about them, and to reveal their difficulties, we should see what are signified by the names of being and essence, how these are found in various things, and how they are related to the logical intentions of genus, species, and difference. And since we need to arrive at the cognition of simple components from the cognition of what they compose, and from those that are posterior to those that are prior, so that the discussion may suitably progress from the easier subjects, we should proceed from the signification of the name of being to the signification of the name of essence.

Offers more the reader more aids -- including notes and a commentary -- than does any other translation.

Joseph Bobik offers a translation of Aquinas’s De Principiis Naturae (circa 1252) and De Mixtione Elementorum (1273) accompanied by a continuous commentary, followed by two essays: “Elements in the Composition of Physical Substances” and “The Elements in Aquinas and the Elements Today.” The Principles of Nature introduces the reader to the basic Aristotelian principles such as matter and form, the four causes so fundamental to Aquinas’s philosophy. On Mixture of the Elements examines the question of how the four elements (earth, air, fire, and water) remain within the physical things composed from them.

Metaphysics or Ontology? treats the evolution of the object of metaphysics from being, to the concept of being, to, finally, the object (thought). Possible being must be non-contradictory, but an object of thought includes anything a human being can think, including contradictions and nothingness. When the concept of being, or object of thought, replaces existence as the object of metaphysics, it becomes something other than metaphysics—ontology, or something beyond ontology. However, ontology cannot examine existence because it only investigates concepts and possibility. Only classical metaphysics investigates reality qua reality. This book masterfully treats the history of this controversy and many other important metaphysical questions raised over the centuries