Fifty years ago, a signal event occurred in the history of American healthcare: ASHP published Mirror to Hospital Pharmacy, the complete report of the Audit of Pharmaceutical Service in Hospitals. Professional publications come and go, of course, garnering attention among practitioners for a short period of time before being replaced by something newer, more advanced, or more comprehensive. A select few, however, become classics that remain significant in a profession’s consciousness because of their depth and breadth. It is so with the Mirror.1 When we look back to the late 1960s, a few foundational events stand out as critical to the practice paradigm shift of clinical pharmacy that changed the profession. Among these were the Audit of Pharmaceutical Service in Hospitals (1957–63), the establishment of the American Hospital Formulary Service by ASHP (1959), Eugene White’s remodeling of his community pharmacy and development of patient profiles,2 the publication of Mirror to Hospital Pharmacy (1964), and the 9th Floor Project at the University of California, San Francisco (1966).3 Of these, the Mirror served as a cornerstone, both marking how the edifice of American hospital pharmacy would be constructed and containing a time capsule of hospital pharmacy practice for the benefit of generations to come.