In her moment of “hysteria,” Sarah followed her instincts, which prompted her to pray to God. This indicates that Sarah had a belief in God already—at least enough of it to trust and believe that he could bring Bendrix back to life if she made a good enough promise. To Sarah’s credit, the moment she saw that Bendrix was alive, she prepared to make good on her promise—she takes her vow to God very seriously, which reveals that she is typically inclined to honesty despite her deceitful extramarital affairs.