In "Midnight Sun" by Stephenie Meyer, the quote "Just like a kitten that thinks it’s a tiger" illustrates the theme of perception versus reality. It implies that sometimes individuals may overestimate their abilities or importance, much like a small kitten perceiving itself as a formidable creature. This playful analogy highlights a disconnect between self-image and the perceptions of others.

The metaphor also serves to characterize the protagonist's journey in the narrative, reflecting on growth and self-discovery. The book delves into complex emotions and identities, emphasizing how one can feel powerful while still being vulnerable. This duality contributes to the richness of the story, inviting readers to consider deeper themes about self-worth and personal transformation.