"Dr. John Bonica and I became good friends quickly, a great benefit to me then and much more later. ...John seemed to take an interest in my having trained in the surgery of children and in two weeks taught me many basic principles of anesthesiology. Little did I know at the time how useful this information would be for me—when I became chief of anesthesia at a hospital army unit in a strange country."
January 1, 1970
https://en.wikiquote.org/wiki/John_Bonica