Acknowledgements
I would like to express my gratitude to all those who assisted me with this project. In thanking them chronologically they are:
Muhammad Ismaili, who assisted me in finding rare articles in the libraries of Iran inaccessible to me; for their administrative support,our secretary Cindy Toomey, our skilled interlibrary loan officer Carla Baily and graphic designer June T. Padgett; and our students Gretchen Schwemer, Shahla Chohan, Lindsay Biddinger, Shannon
MacMichael, Patrick Shepherd, Stephanie Van Hook and Zeke Kassock who have all been very helpful. I am grateful to Professor Seyyed Hossein Nasr for his suggestions on an early draft of this work, and Professor Suzanne Sumner of our Mathematics
Department for her suggestions on Chapter Seven. I am particularly indebted to my dear colleague and friend, Professor David Cain for his most thorough reading of this book and his numerous suggestions. Much of the revisions made in the final edition are due to his diligence. Finally, I am thankful to the University of Mary Washington for a grant that enabled me to complete some of the research pertaining to Chapter Eight.
Mehdi Aminrazavi
University of Mary Washington
Fredericksburg, VA
Speak of happiness and wine
and seek not the riddle of the universe,
For no one has, nor will
unveil this mystery through wisdom
(Hafēz)