"The aim of this volume is to investigate the topic of Substance and Attribute. The way leading to this aim is a dialogue between Islamic and Western Philosophy. Most of the collected papers in our book are results of contributions to a workshop, organized by the editors of the volume, as an integrated part of the 29th International Ludwig Wittgenstein Symposium in Kirchberg, Lower Austria, taking place in August2006. The general theme of this conference was Cultures: Conflict, Analysis, Dialogue. The organizational frame of the workshop and also of this edition is the partnership between the Imam Khomeini Education and Research Institute in Qom, Iran, and the University of Innsbruck in Austria, the first formal high level academic partnership between an Iranian Institution and a European University. Dialogue is our aim, but not speaking about dialogue. Our dialogue shall be a work in practice; and our practice is a philosophical one. Our project is motivated by the observation that the roots of Islamic and of Western Philosophy are very similar. There is a strong consensus among historians of philosophy that these roots are the same in substance, and the differences are only of accidental importance. Some of the articles in this volume are dedicated to the history of philosophy, in Islamic thinking as well as in Western traditions. Avicenna and Thomas Aquinas are authors to whom reference is made in most of the historical contributions. Through their elaborations, these contributions will make clear what is mentioned here roughly"--