Marc P. Steinberg, MD, FAAP (1952–2022), developed a focus on diabetes care during his 32 years of practice as a physician. He became increasingly interested in working more effectively with people struggling with the self-care of chronic conditions. After ending his medical practice in 2013, he focused on training health care providers in MI. Dr. Steinberg published articles on MI in Diabetes Spectrum and was a member of the Motivational Interviewing Network of Trainers. He belonged to the national medical honor society, Alpha Omega Alpha, and was a Fellow of the American Academy of Pediatrics. For more than 40 years, he maintained an active lifestyle with type 1 diabetes. William R. Miller, PhD, is Emeritus Distinguished Professor of Psychology and Psychiatry at the University of New Mexico. He introduced motivational interviewing in a 1983 article and in the first edition of Motivational Interviewing (1991), coauthored with Stephen Rollnick. Dr. Miller’s research has focused particularly on the treatment and prevention of addictions and more broadly on the psychology of change. He is a recipient of two career achievement awards from the American Psychological Association, the international Jellinek Memorial Award, and an Innovators Award from the Robert Wood Johnson Foundation, among many other honors. His publications include 65 books and over 400 articles and chapters. His website is https://williamrmiller.net.