The central debate of natural theology among medieval Muslims and Jews concerned whether or not the world was eternal. Opinions divided sharply on this issue because the outcome bore directly on God's relationship with the world: eternity implies a deity bereft of will, while a world with a beginning leads to the contrasting picture of a deity possessed of will. In this exhaustive study of medieval Islamic and Jewish arguments for eternity, creation, and the existence of God, Herbert Davidson provides a systematic classification of the proofs, analyzes and explains them, and traces their sources in Greek philosophy. Throughout the study, Davidson tries to take into account every argument of a philosophical character, disregarding only those arguments that rest entirely on religious faith or which fall below a minimal level of plausibility.

The endeavour to prove God’s existence through rational argumentation was an integral part of classical Islamic theology (kalām) and philosophy (falsafa), thus the frequently articulated assumption in the academic literature. The Islamic discourse in question is then often compared to the discourse on arguments for God’s existence in the western tradition, not only in terms of its objectives but also in terms of the arguments used: Islamic thinkers, too, put forward arguments that have been labelled as cosmological, teleological, and ontological. This book, however, argues that arguments for God’s existence are absent from the theological and philosophical works of the classical Islamic era. This is not to say that the arguments encountered there are flawed arguments for God’s existence. Rather, it means that the arguments under consideration serve a different purpose than to prove that God exists. Through a close reading of the works of several mutakallimūn and falāsifa from the 3rd‒7th/9th‒13th century, such as al-Bāqillānī and Fakhr al-Dīn al-Rāzī as well as Ibn Sīnā and Ibn Rushd, this book proffers a re-evaluation of the discourse in question, and it suggests what its participants sought to prove if it is not that God exists.

Beginning with the earliest philosopher of the Middle Ages, Saadiah ben Joseph al-Fayyumi, this work surveys the writings of such figures as Solomon ben Joseph ibn Gabirol, Bahya ben Joseph ibn Pakuda, Abraham ben david Halevi ibn Daud, Judah Halevi, Moses Maimonides, Gersonides, Hasdai Crescas, Simon ben Zemah Duran, Joseph Albo, Isaac Arama, and Isaac Abrabanel. Throughout an attempt is made to place these thinkers in an historical context and describe their contributions to the history of Jewish medieval thought in simple and lucid terms. The book is directed to students enrolled in Jewish studies courses as well as to those who seek an awareness and appreciation of the riches of medieval Jewish philosophical tradition.

Eternity is a unique kind of existence that is supposed to belong to the most real being or beings. It is an existence that is not shaken by the common wear and tear of time. Over the two and half millennia history of Western philosophy we find various conceptions of eternity, yet one sharp distinction between two notions of eternity seems to run throughout this long history: eternity as timeless existence, as opposed to eternity as existence in all times. Both kinds of existence stand in sharp contrast to the coming in and out of existence of ordinary beings, like hippos, humans, and toothbrushes: were these eternally-timeless, for example, a hippo could not eat, a human could not think or laugh, and a toothbrush would be of no use. Were a hippo an eternal-everlasting creature, it would not have to bother itself with nutrition in order to extend its existence. Everlasting human beings might appear similar to us, but their mental life and patterns of behavior would most likely be very different from ours. The distinction between eternity as timelessness and eternity as everlastingness goes back to ancient philosophy, to the works of Plato and Aristotle, and even to the fragments of Parmenides' philosophical poem. In the twentieth century, it seemed to go out of favor, though one could consider as eternalists those proponents of realism in philosophy of mathematics, and those of timeless propositions in philosophy of language (i.e., propositions that are said to exist independently of the uttered sentences that convey their thought-content). However, recent developments in contemporary physics and its philosophy have provided an impetus to revive notions of eternity due to the view that time and duration might have no place in the most fundamental ontology. The importance of eternity is not limited to strictly philosophical discussions. It is a notion that also has an important role in traditional Biblical interpretation. The Tetragrammaton, the Hebrew name of God considered to be most sacred, is derived from the Hebrew verb for being, and as a result has been traditionally interpreted as denoting eternal existence (in either one of the two senses of eternity). Hence, Calvin translates the Tetragrammaton as 'l'Eternel', and Mendelssohn as 'das ewige Wesen' or 'der Ewige'. Eternity also plays a central role in contemporary South American fiction, especially in the works of J.L. Borges. The representation of eternity poses a major challenge to both literature and arts (just think about the difficulty of representing eternity in music, a thoroughly temporal art). The current volume aims at providing a history of the philosophy of eternity surrounded by a series of short essays, or reflections, on the role of eternity and its representation in literature, religion, language, liturgy, science, and music. Thus, our aim is to provide a history of philosophy as a discipline that is in constant commerce with various other domains of human inquisition and exploration.

In this tour of the history of arguments for and against the existence of God, Nathan Schneider embarks on a remarkable intellectual, historical, and theological journey through the centuries of believers and unbelieversÑfrom ancient Greeks, to medieval Arabs, to todayÕs most eminent philosophers and the New Atheists. Framed by an account of SchneiderÕs own unique journey, God in Proof illuminates the great minds who wrestled with one of historyÕs biggest questions together with their arguments, bringing them to life in their time, and our own. SchneiderÕs sure-handed portrayal of the characters and ideas involved in the search for proof challenges how we normally think about doubt and faith while showing that, in their quest for certainty and the proofs to declare it, thinkers on either side of the God divide are often closer to one another than they would like to think.

This thematic introduction to classical Islamic philosophy focuses on the most prevalent philosophical debates of the medieval Islamic world and their importance within the history of philosophy. Approaching the topics in a comprehensive and accessible way in this new volume, Luis Xavier Lopez-Farjeat, one of the co-editors of The Routledge Companion to Islamic Philosophy, makes classical Islamic philosophy approachable for both the new and returning student of the history of philosophy, medieval philosophy, the history of ideas, classical Islamic intellectual history, and the history of religion. Providing readers with a complete view of the most hotly contested debates in the Islamic philosophical tradition, Lopez-Farjeat discusses the development of theology (kalām) and philosophy ( falsafa) during the ʿAbbāsid period, including the translation of Aristotle into Arabic, the philosophy and theology of Islamic revelation, logic and philosophy of language, philosophy of natural science, metaphysics, psychology and cognition, and ethics and political philosophy. This volume serves as an indispensable tool for teachers, students, and independent learners aiming to discover the philosophical problems and ideas that defined the classical Islamic world. Key Features • Offers readers a broad, thorough view of the history of Islamic philosophy by using a thematic approach. • Traces the dialogues between philosophers and theologians about important and controversial topics. • Offers both historical descriptions of the key debates in classical Islamic philosophy and current interpretations by contemporary scholars. • Includes extensive lists for further reading at the end of each chapter, directing curious students to the best avenues for further research.