Dr Light always wanted to be a doctor, even without any formative experience with family illness or medical mentors. A guidance counselor unwisely tried to dissuade him from this hope. Taking up the challenge, he took premed subjects as his elective courses at Boulder and applied to Johns Hopkins Medical School. He was accepted and drove across the country to city life in Baltimore, Maryland, where he also did his residency and pulmonary fellowship. There he met and worked with numerous present and future luminaries in pulmonary medicine. His senior resident, A. Jay Block, MD, later Editor of CHEST and Chief of Pulmonary Medicine at the University of Florida, excited Dr Light by his infectious enthusiasm and love of medicine. Dick Winterbauer, MD, Chief Resident and later Chief at Virginia Mason, challenged him to study the problem of undiagnosed pleural effusion. Mary Betty Stevens, MD, showed him how to approach the patient as a person and to think clearly about medical diagnosis. Wil Ball, MD, was his main pulmonary mentor. Dr Light was attracted to pulmonary medicine by his engineering background, in an era where his talents were ideally suited to the quantification of physiologic tests, including the problems of ventilation/perfusion matching, body plethysmography, spirometry, and exercise physiology.