Lily felt frustrated with Caleb, but she recognized that engaging him in an argument would be unproductive. Instead of making progress, it seemed futile, as if she were trying to have a meaningful conversation with an immovable object. This realization led her to understand the importance of choosing her battles wisely.

In the context of the story "Lily and the Major" by Linda Lael Miller, Lily's interactions with Caleb highlight her determination and practicality. Rather than letting her emotions dictate her actions, she decides to focus on more pressing matters instead of wasting time on an unyielding opponent.