Sally's smile holds a profound significance for the narrator, suggesting that her warmth and beauty have a lasting impact on him. The depth of his affection is evident in his wish to have that smile as his final memory, illustrating how much she means to him. This sentiment underscores the themes of love and the importance of cherished moments in life.

The quote from Wallace Stegner's "Crossing to Safety" encapsulates the emotional connection between characters, representing a deep appreciation for the simple yet powerful gestures of affection. It emphasizes how fleeting instances can leave a lasting impression, especially in the context of one's final moments.