Describe symbolism in Emergence: Labeled Autistic by Temple Grandin

When Temple leaves for graduate school, she is plagued by feelings of "self-doubts and a sense of worthlessness." She fixates on a sliding glass door as a symbol of getting through these bad feelings. It is a supermarket door. She stands there and looks at it at length without going through, although many people pass in and out. She sees the glass door as having a quality of openness, which she desires. Three weeks after seeing the door, she just walks through one day. She feels it is a "groovy" experience. One day, she walks in and out ten times, but the store manager doesn't bother her about it.