The phrase “burning bush” is an allusion to the Judeo-Christian Book of Exodus, in which God speaks to the prophet Moses out of a bush that burns without being consumed by the first. In the Catholic tradition—to which the narrator, a Frenchman, presumably belongs—the burning bush is sometimes interpreted as foreshadowing Mary’s virgin birth of Jesus Christ. Thus, when the narrator says he felt like a “burning bush” despite his own lack of religiosity, he is essentially saying that he had a Messiah complex—and suggesting the importance of religious stories to his interpretation of the world despite his own status as an unbeliever. Meanwhile, his reference to “the evening when . . .” hints at a traumatic event in his past he is not yet ready to reveal.