In this episode of The Enneagram in a Movie podcast, Mario Sikora, TJ Dawe and TJ Ingrassia talk about Green Book through Dr. Donald Shirley, the concert pianist played by Mahershala Ali. Dr. Shirley is a Preserving Four that uses refinement as a barrier, not a bridge. They discuss how a Preserving Four can build such an elegant prison that even when someone offers them a way out, they hesitate to leave.