In the field of observation, chance favors the prepared mind.
—Louis Pasteur
Jane Morse, MD, possessed a prepared mind, and she used her years of preparation to serve patients andfamilies whose lives were devastated by pulmonary arterial hypertension. The story of her contributions is a tale of two careers, both of which were essential to her brilliant success. Dr Morse began her career in research after she received her MD degree from Columbia University’s College of Physicians and Surgeons. This was the right direction for a young physician with insight for careful observation,