Kerr examines St Thomas Aquinas's much-neglected proof for the existence of God in 'De Ente et Essentia', Chapter 4. He offers a contemporary presentation and interpretation of this proof as well as a defence. Beginning with the distinction between the key concepts of 'essence' and 'esse' in Aquinas's thought, the book moves from an account of these metaphysical principles to their use by Aquinas in establishing that there is a single unique primary cause from which all that is comes to be. Along the way, important themes in metaphysics are examined from a Thomistic perspective.

This path-breaking approach to Thomas Aquinas interprets the Five Ways in the context of his theory of science. Aquinas is the leading medieval philosopher and his work is of continuing contemporary relevance. Addressing all the critical themes of authority and reason, Christopher Martin examines the role of science and definitions in medieval thought, and how to deal with the big question: is there a God? Rigorous and challenging, Martin's clear exposition compares and contrasts Aquinas' arguments with those of other philosophers, Anselm, Descartes and Kant.

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.

The purpose of this study is to investigate the legitimacy of the principle, "The per accidens necessarily implies the per se," as it is found in the writings of St. Thomas Aquinas. Special emphasis will be placed upon the function of this principle in the proofs for God's existence. The relevance of the principle in this latter context can be seen at once when it is observed that it is the key to the solution of the well known "prob lem of infinite regress. " The investigation of the principle in question will be divided into two Parts. A preliminary examination of the function of the principle will be made in Part I: Domains Other Than That of Creature-God. The domains to be considered in this Part are those of accident-substance, change, and knowledge. Employing what is learned of the function of the principle in these areas of application, Part II: The Domain of Creature-God will analyze the role of the principle in the proofs for God's existence. This latter Part will constitute the greater portion of the book, since the domain of creatures in their relation to God is the most significant application of the principle in the writings of St. Thomas. In the course of this investigation, relevant analyses by St. Thomas' commentators - both classical and contemporary - will be considered. Finally, in light of the insights offered by St.

Brian Davies offers the first in-depth study of Saint Thomas Aquinas's thoughts on God and evil, revealing that Aquinas's thinking about God and evil can be traced through his metaphysical philosophy, his thoughts on God and creation, and his writings about Christian revelation and the doctrines of the Trinity and the Incarnation. Davies first gives an introduction to Aquinas's philosophical theology, as well as a nuanced analysis of the ways in which Aquinas's writings have been considered over time. For hundreds of years scholars have argued that Aquinas's views on God and evil were original and different from those of his contemporaries. Davies shows that Aquinas's views were by modern standards very original, but that in their historical context they were more traditional than many scholars since have realized. Davies also provides insight into what we can learn from Aquinas's philosophy. Thomas Aquinas on God and Evil is a clear and engaging guide for anyone who struggles with the relation of God and theology to the problem of evil.

A small error at the outset can lead to great errors in the final conclusions, as the Philosopher says in I De Caelo et Mundo cap. 5 (271b8-13), and thus, since being and essence are the things first conceived of by the intellect, as Avicenna says in Metaphysicae I, cap. 6, in order to avoid errors arising from ignorance about these two things, we should resolve the difficulties surrounding them by explaining what the terms being and essence each signify and by showing how each may be found in various things and how each is related to the logical intentions of genus, species, and difference. Since we ought to acquire knowledge of simple things from composite ones and come to know the prior from the posterior, in instructing beginners we should begin with what is easier, and so we shall begin with the signification of being and proceed from there to the signification of essence.