If I rarely refer in this book to others whose writing has been helpful to me, it is because no one I have read accomplishes, or even undertakes, what I have tried to do here. In that sense, my discussion here builds upon both all of the views of the philosophers with whom I have come into contact and none of them.
It is a pleasure to express my gratitude to colleagues, friends, and institutions who were helpful to me in the preparation of this study. An anonymous reader for Indiana University Press made careful, useful comments on an earlier version of the manuscript. Edward Casey, John E. Smith, and Maurice Natanson were helpful in various ways, either by suggesting the project to me, through remarks on an earlier version of the manuscript, or in conversation productive of useful insight.
Special thanks must go to the Alexander von Humboldt-Stiftung, whose generous award of a research fellowship [Forschungsstipendium] made it possible for me to spend the academic year 1981–1982 in Tübingen, West Germany, where the first draft was written. The entire Philosophisches Seminar welcomed me there with grace and good will, collectively and individually. I am especially indebted to Klaus Hartmann for stimulating discussion, warm personal contact, and every possible courtesy during my stay in Tübingen.
For an equally important form of generosity, required for the successful completion of this project, I would be remiss not to thank my wife and children.