My first acquaintance with the thinking of Murray Bowen was through reading “On the Differentiation of Self,” the paper in which Dr. Bowen presents his theory and describes how it guided his effort toward differentiation of self in his own family. In my first couple of readings, I understood little of the theory or what Dr. Bowen was doing on those visits home, but I heard him clearly on the results. His family became calmer and more flexible. Personal communication opened up. Seriousness gave way to humor.