“…Insight plays an important role in therapeutic action—that is, the mechanism of change—for a broad range of psychotherapies. This includes psychotherapies stemming from existential (e.g., Boss, 1963; Cooper, 2007; Frankl, 1986, 1988; Hill, 2017, 2018; May, 1983; Wong, 2010, 2016a, 2016c; Yalom, 1980) and cognitive–behavioral (e.g., Ellis, 1963; Grosse Holtforth et al, 2007) traditions. Some theorists argue that insight plays an integral role in—and is a “common factor” across—all “psychotherapeutic orientations” (Wampold, Imel, Bhati, & Johnson-Jennings, 2007, p. 119).…”