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Summary Thomas Aquinas (c. 1225-1274) is the most influential Christian philosopher and theologian of the Scholastic period. His influence is primarily due to his synthesis of Aristotelian philosophy with Christian theology, as well as the breadth and systematic rigor of his writings. He wrote extensively on philosophical theology, metaphysics, epistemology, human nature (including philosophy of mind) and ethics (including moral psychology, virtue ethics, and natural law theory). The wide-ranging appeal of his theories have inspired a variety of "Thomisms" throughout the 20th century, under such prefatory labels as "Existential," "Transcendental," "Phenomenological," and "Analytical." His philosophical system has been explicitly promoted as the foundation par excellence for Catholic theology by Pope Leo XIII and Pope John Paul II.  
Key works For a comprehensive collection of Aquinas's works (in Latin) see Opera Omnia. Aquinas's most significant writings are the voluminous Summa theologiae and Summa contra Gentiles. Among his philosophical writings are comprehensive commentaries on Aristotle's works, including Metaphysics, Physics, De anima, Nicomachean Ethics, Politics, and Posterior Analytics. Extensive arguments on certain topics can be found in collections of Disputed Questions on subjects such as truth, virtue, evil, the soul, and the power of God. Shorter, yet philosophically impactful, treatises Aquinas wrote include On Being and Essence and On Kingship.
Introductions A classical introduction to Aquinas's overall philosophical thought is Gilson 1956. An excellent recent introductory text is Davies 1993. A more in-depth scholarly treatment of various themes in Aquinas's philosophical system is provided by Stump 2003.
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  1. Principium Vs. Principiatum: The Transcendence of Love in Hildebrand and Aquinas.Francis Feingold - manuscript
    This paper seeks to defuse two claims. On the one hand, I confront the Hildebrandian claim that Thomism, by placing the principium of love in the needs and desires of the lover rather than in the beloved, denies the possibility of transcendent love; on the other, I seek to refute the Thomistic objection that Hildebrand lacks a sufficient understanding of nature and its inherent teleology. In order to accomplish this, a distinction must be made between different kinds of principium or (...)
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  2. The Stump-Aquinas-Dawkins Thesis.Daniel Howard-Snyder - manuscript
    Stump, Aquinas, and Dawkins & Company seem to think that objectual faith--"faith in"--is identical with propositional belief. I argue that they are wrong. More plausibly, objectual faith requires belief of the relevant proposition(s). There are other forms of faith: propositional faith, allegiant faith, and affective or global faith. We might conjecture that each of these forms of faith likewise require belief of the relevant propositions. More weakly, we might conjecture that at least one of them does. This latter thesis I (...)
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  3. El conocimiento teológico natural y la teoría del maestro interior en Tomás de Aquino.Javier Eduardo Perna - manuscript
    En la teoría epistémica de Tomás de Aquino la lumen rationis desempeña la función de causa última del inventario completo del conocimiento humano natural. La tesis de acuerdo a la cual esa luz es puesta en nosotros por Dios justifica, de acuerdo al autor, la aserción de que la divinidad es el único y auténtico maestro interior del hombre. Ahora bien, en la visión beatífica la lumen naturale es perfeccionada por una luz sobrenatural, y la unión cognitiva con lo conocido (...)
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  4. El Teólogo y el búho. La teología aenigmatica de Tomás de Aquino.Javier Eduardo Perna - manuscript
    A lo largo de la obra de Tomás de Aquino es posible encontrar cierta tensión textual en torno a la posibilidad de conocer de manera natural la esencia divina. Por un lado el teólogo parece afirmar que, precisamente, no podemos conocer acerca de Dios qué es, sino solo qué no es. Pero, por otra parte, existe evidencia textual de que habría sostenido la posibilidad de un conocimiento quiditativo imperfecto. En tanto y en cuanto el matiz más positivo suele aparecer con (...)
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  5. Thomas Aquinas On Knowledge.Raphael Descartes M. Roldan - manuscript
    This is an excerpt of Aquinas' proof of the existence of God. In proving God's existence, Aquinas lays out a cosmological argument of which also sets that tone for his seminal work in epistemology.
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  6. Aquinas’ Moral Philosophy.Shawn Floyd - unknown - Internet Encyclopedia of Philosophy.
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  7. Aquinas, Thomas.Author unknown - manuscript
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  8. Conceito E Objeto Em Tomás de Aquino.Rf Landim Filho - unknown - Analytica 14 (2):65 - 88.
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  9. Two Ways of Looking at the Third Way of St. Thomas Aquinas.Darko Pinkjac - unknown - Eidos: The Canadian Graduate Journal of Philosophy 16.
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  10. Old Aquinas.W. P. Alston, W. C. Salmon, V. Thomas, G. Nakhnikian & A. Anderson - forthcoming - Proceedings and Addresses of the American Philosophical Association.
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  11. Un episodio de iracundia en Tomás de Aquino: la polémica contra los averroístas de París.Jorge Martínez Barrera - forthcoming - Sapientia.
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  12. Le Colloque de Cordoue. Ibn Ruschd, Maimonide, Saint Thomas, Ou la Filiation Entre Foi Et Raison.L. Bauloye, F. Beets & M. Lambert - forthcoming - Revue Internationale de Philosophie.
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  13. Brian Davies, The Thought of Thomas Aquinas.F. Beets - forthcoming - Revue Internationale de Philosophie.
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  14. Otto Hermann PESCH, Thomas d'Aquin, Grandeur Et Limites d'Une Theologie.F. Beets - forthcoming - Revue Internationale de Philosophie.
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  15. Los Manuscritos de Santo Tomas En la Biblioteca de Cabildo de Toledo.V. Beltrán de Heredia - forthcoming - Ciencia Tomista.
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  16. La Enseñanza de Santo Tomás En la Universidad de Alcalá.Vicente Beltrán de Heredia - forthcoming - Ciencia Tomista.
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  17. El 'Lumen Intellectus Agentis' En la Ontología Del Conocimiento de Santo Tomás.F. Canals - forthcoming - Convivium: revista de filosofía.
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  18. A Thomistic Reflection on Philippa Foot's Corrective Theory of Virtue.Nathan Luis Cartagena - forthcoming - Heythrop Journal.
    In her influential essay ‘Virtues and Vices,’ Philippa Foot argues that virtues are essentially corrective, moderating between two vicious extremes. She also contends that Aquinas champions this view, too. In contrast, I argue that Foot misreads Aquinas; that Aquinas's actual theory of virtue is incompatible with the corrective theory Foot defends; and that those who endorse Aquinas's Augustinian theology should side with his perfective theory of virtue rather than Foot's corrective one.
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  19. The Philosophical Approach to God: A New Thomistic Perspective.S. J. Clarke & W. Norris - forthcoming - Philosophy.
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  20. Teocentrismo E Beatitade: Sobre a Actualidade Do Pensamento de S. Tomás de Aquino.Henrique C. de Lima Vaz - forthcoming - Revista Portuguesa de Filosofia.
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  21. Cur Divus Thomas?Werner Dettloff - forthcoming - Wissenschaft Und Weisheit.
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  22. L'illumination Et le Langage des Anges Chez Saint Thomas d'Aquin.Gilles Emery - forthcoming - Nova Et Vetera.
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  23. Límite teológico y finitud fenomenológica en Tomás de Aquino.Emmanuel Falque - forthcoming - Sapientia.
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  24. Roger Pouivet, Apres Wittgenstein, Saint Thomas.P. Gochet - forthcoming - Revue Internationale de Philosophie.
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  25. San Agustin, San Anselmo y Santo Tomás. La Imagen Psicológica de la Trinidad En De Trinitate, Monologion y Summa Theologiae.Wayne J. Hankey - forthcoming - Augustinus.
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  26. Transcendental Multitude in Thomas Aquinas in Advance.Joshua Lee Harris - forthcoming - Proceedings of the American Catholic Philosophical Association.
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  27. Aquinas and the Question of God's Existence: Exploring the Five Ways.Damian Ilodigwe - forthcoming - International Journal of Philosophy and Theology 2018 (1).
    Without doubt, St Thomas Aquinas was the greatest of the medieval philosophers. Aquinas was a prolific writer and he made contributions to virtually every area of Philosophy and Theology. His account of the existence of God is perhaps the best known aspect of his work. This is especially true of the celebrated five arguments he adduced in demonstration of the existence of God. In exploring Aquinas’ Five ways, which some commentators regard as Aquinas’ substantive contribution to Philosophy of religion, our (...)
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  28. Believing the Incomprehensible God: Aquinas on Understanding God’s Testimony.O. P. James Dominic Rooney - forthcoming - Proceedings of the American Catholic Philosophical Association.
    While there has been recent epistemological interest as to whether knowledge is 'transmitted' by testimony from the testifier to the hearer, there is another facet of the epistemology of testimony that raises a distinct problem: whether a hearer can receive testimonial knowledge without fully understanding the content of the testimony. Aquinas' account of faith illustrates the problem of receiving testimonial knowledge without being able to comprehend the content of testimony. As Aquinas conceives of it, revelation provides a case in principle (...)
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  29. O Esse Na Ética de Raimundo Lúlio (Ramon Llull).Esteve Jaulent - forthcoming - Veritas – Revista de Filosofia da Pucrs.
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  30. Intellect and Imagination in Aquinas.Anthony Kenny - forthcoming - Aquinas: A Collection of Critical Essays, Notre Dame.
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  31. ""Petrarch's" Averroists": A Note on the History of Aristotelianiam in Venice, Padua, and Bologna.Paul Oskar Kristeller - forthcoming - Bibliothèque d'Humanisme Et Renaissance.
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  32. James A. Weisheipl, Frere Thomas d'Aquin. Sa Vie, Sa Pensee, Ses Oeuvres.M. Lambert - forthcoming - Revue Internationale de Philosophie.
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  33. Jean-Pierre Torrell, Initiation a Saint Thomas d'Aquin. Sa Personne Et Son Oeuvre.M. Lambert - forthcoming - Revue Internationale de Philosophie.
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  34. Thomas Aquinas and the Problem of Nature in Physics II, I.Helen S. Lang - forthcoming - History of Philosophy Quarterly.
    This article considers the definition of nature as given by Aristotle in "Physics" II and the commentaries on it by Philoponus and Thomas Aquinas. Through Aristotle's definition and its treatment in two commentaries, we can see how each philosopher defines philosophy as an enterprise and the problems encompassed by it. I conclude that the conception of philosophy, and consequently its problems, is quite distinct in each case and should be considered as such; as a further consequence, the whole notion of (...)
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  35. The Common Good in the Political Theory of Thomas Aquinas.Anthony J. Lisska & Maria Theresa - forthcoming - The Thomist.
    This study investigates the function of the common good in the political theory of thomas aquinas. it concludes that at every point in his political theory the concept of the common good plays a significant, if not determinative role. his moderate position between collectivism and individualism recognizes that the individual lives in social relationships which include social responsibilities.
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  36. Acedia and Its Relation to Depression.Derek McAllister - forthcoming - In Josefa Ros Velasco (ed.), The Faces of Depression in Literature. Bern, Switzerland: pp. 3-27.
    There has been recent work on acedia and its relationship to depression, but the results are a mixed bag. In this essay, I engage some recent scholarship comparing acedia with depression, endeavouring to clarify the concept of acedia using literature from theology, philosophy, psychiatry, and even a 16th-century treatise on witchcraft. Along the way, I will show the following key theses. First, the concept of acedia is not identical to the concept of depression. Acedia is not merely a primitive psychological (...)
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  37. Thomas Aquinas.Ralph McInerny & John O'Callaghan - forthcoming - Stanford Encyclopedia of Philosophy.
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  38. Book Review: Gaven Kerr, Aquinas's Way to God (Oxford: Oxford University Press, 2015), 1-205. [REVIEW]Tyler McNabb - forthcoming - Heythrop Journal.
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  39. That Restless Immobility: Thomas Aquinas’ Anthropological Paradox.Joseph Morgan-Smith - forthcoming - New Blackfriars 97 (1071).
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  40. La Theoria Penalista de Santo Tomas.J. Nunendez - forthcoming - Ciencia Tomista.
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  41. The Temporality of Prudence in Thomas Aquinas in Advance.Kevin E. O’Reilly - forthcoming - American Catholic Philosophical Quarterly.
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  42. Exegesis Theologica Circa Quemdam Textum S. Thomae (I-II, Q. 9, A. 3, Ad 3).R. Petrone - forthcoming - Divus Thomas.
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  43. “In as Many Ways as Something is Predicated ... In That Many Ways is Something Signified to Be”: The Logic Behind Thomas Aquinas’s Predication Thesis, Esse Substantiale, and Esse in Rerum Natura.Elliot Polsky - forthcoming - Proceedings of the American Catholic Philosophical Association.
    Thomistic commentators agree that Thomas Aquinas at least nominally allows for 'to be' (esse) to signify not only an act contrasted with essence in creatures, but also the essence itself of those creatures. Nevertheless, it is almost unheard of for any author to interpret Thomas's use of the word 'esse' as referring to essence. Against this tendency, this paper argues that Thomas's In V Metaphysics argument that every predication signifies esse provides an important instance of Thomas using esse to signify (...)
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  44. Secunda Operatio Respicit Ipsum Esse Rei: An Evaluation of Jacques Maritain, Étienne Gilson, and Ralph McInerny on the Relation of Esse to the Intellect’s Two Operations.Elliot Polsky - forthcoming - Nova et Vetera.
    In a few texts, Thomas Aquinas says that the first operation of the intellect pertains to (respicit) “the quiddity of a thing” whereas the second operation pertains to “the to be itself of a thing” (esse). But Aquinas also says that quiddities are to the intellect as color is to the power of sight. Statements such as these seem to have led Jacques Maritain and Étienne Gilson to see esse as the proper object of the intellect’s second operation. Against this (...)
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  45. Thomas Aquinas's Semiotics of the Old Law in Terms of The Natural Law.Randall Smith - forthcoming - Semiotics.
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  46. ‘I Am that I Am’ (Ex. 3.14): from Augustine to Abhishiktānanda—Holy Ground Between Neoplatonism and Advaita Vedānta.Daniel Soars - forthcoming - Sophia:1-20.
    We shall revisit a debate which has been going on at least since pioneering British Indologists like William Jones first encountered the ‘Brahmanic theology’ we now know as Vedānta, namely, the nature of the relationship—if any—between certain forms of ‘western’ and ‘Indian’ idealisms, and how these metaphysical systems have influenced Christian theology. Specifically, we look at the question of possible thematic and conceptual convergences between Neoplatonism and Advaita Vedānta, and argue that significant parallels can be found in their common conception (...)
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  47. S. Thomas d'Aquin Et la Prédétermination Non Nécessitant.P. Synave - forthcoming - Revue Thomiste.
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  48. Un Nuevo Ente Contable Llamado Fideicomiso.Carmen Stella Verón - forthcoming - Enfoques (Misc.).
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  49. Aquinas on Friendship. Oxford-New York: Oxford University Press. [REVIEW]J. H. Weed - forthcoming - Journal of the History of Philosophy.
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  50. On Method in Reading the De Ente Et Essentia in Advance.Tracy Wietecha - forthcoming - International Philosophical Quarterly.
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