Be patient toward all that is unresolved in your heart and try to love the questions themselves.--Rainer Maria Rilke
My wife, Wil O'Loughlin, has been a wonderful partner during the draining process of writing, and she and my children, Alena and Mariel, have provided love, light, warmth, and laughter, as well as a healthy dose of perspective. My parents, Noreen and Ralph Steen, have been supportive and enthusiastic throughout the process of clarifying confusion, identifying ignorance, and delimiting real knowledge. Colleagues at the University of California, Los Angeles, have played a large role in teaching me to think like a scientist while writing like a person: Dr. Leonard Muscatine still serves as a model of clarity in writing; Dr. George Laties is an example of the eternal youth of the questioning mind; and Dr. Margaret McFall-Ngai remains one of the best scientists I know. I also want to thank Matthew Galvez and Dr. Linda Porter, who encouraged me to follow this path; Dr. Barry Fletcher and Dr. June Taylor, who make it possible to continue; and Linda Regan and Jeanne Fredericks, who have helped it all to happen.